Showing 86 items
matching distance measures
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Eltham District Historical Society Inc
Photograph, Autumn Excursion, Hume and Hovell's 1824 expedition, 26 May 1996, 26/05/1996
... of the You Yangs to Lara and Avalon Beach. Because their distance... and Avalon Beach. Because their distance-measuring wheel had broken ...[article by Bettina Woodburn in EDHS Newsletter No. 109, July 1996:] ON THE TRAIL OF HUME AND HOVELL - REPORT ON THE AUTUMN EXCURSION - On a green and fresh morning (Sunday 26th May 1996) the Cobb and Co coach (driven by the most obliging Peter Tampion) set off in a north easterly direction from Eltham to connect with Hume and Hovell's route on their 1824 explorations of central Victoria. The Society would follow a series of monuments erected for the 1924 centenary of the expedition from King Parrot Creek (Tuesday 7th December 1824), through Strath Creek, over Sunday Creek (Sunday 12th December 1824) at Broadford, Tullamarine, St Albans, Deer Park, through Werribee, skirting east of the You Yangs to Lara and Avalon Beach. Because their distance-measuring wheel had broken and a one degree mistake was made in calculations, the two leaders of the original group of six convict-companions arrived at Corio Bay, instead of the expected Western Port, discovered earlier by Flinders. From below Mt. Disappointment (Hume and Hovell's difficulties in "scrambling over brush and rock", "leeches in forest, as well as no water", "cutting grass 4-5 ft. high", dreadful scrub", "devil flies") we took an easier route, saw the Strath Creek memorial in ground fog and a wonderful "field of dreams", the Hume-Hovell privately owned cricket ground with its white picket boundary fence. Now, after a steep climb, in sunshine under gums we stretched and viewed magnificent rolling hills and fog-filled valleys - not "smoke from Aborigines' bush fires". After morning tea at Broadford we followed the Sunday Creek valley beside the Hume Freeway, passed the Wallan Wallan Rest Area (more appropriately Hume and Hovell Rest Area) to tum right at Beveridge. In Gellibrand Hill Park, near the headwaters of the Moonee Ponds Creek, we experienced the landscape the first European settlers saw - huge river red gums and rolling pastures. The gardens and sheltered courtyard of the 1840s, timber, brought from .....[?] prefabricated Woodlands Homestead, provided a pleasant lunch stop. We enjoyed a private tour, panoramic views over Melbourne and surroundings and the excitement of arriving and departing aircraft. Our next river crossing was at Werribee, "in a vast treeless plain", then we drove on by-ways no coach had previously travelled, to find "an immense sheet of water" salty Corio Bay, off-course to the west. In late afternoon of a super, calm, late autumn day we headed homewards. Back at Eltham we were rather surprised to find that we had travelled a total of 347 km. Thanks again to Russell Yeoman for his research and organization. What a wonderful day! Colour photographactivities, hume and hovell -
Eltham District Historical Society Inc
Photograph, Murchison Gap, Autumn Excursion, Hume and Hovell's 1824 expedition, 26 May 1996, 26/05/1996
... of the You Yangs to Lara and Avalon Beach. Because their distance... and Avalon Beach. Because their distance-measuring wheel had broken ...[article by Bettina Woodburn in EDHS Newsletter No. 109, July 1996:] ON THE TRAIL OF HUME AND HOVELL - REPORT ON THE AUTUMN EXCURSION - On a green and fresh morning (Sunday 26th May 1996) the Cobb and Co coach (driven by the most obliging Peter Tampion) set off in a north easterly direction from Eltham to connect with Hume and Hovell's route on their 1824 explorations of central Victoria. The Society would follow a series of monuments erected for the 1924 centenary of the expedition from King Parrot Creek (Tuesday 7th December 1824), through Strath Creek, over Sunday Creek (Sunday 12th December 1824) at Broadford, Tullamarine, St Albans, Deer Park, through Werribee, skirting east of the You Yangs to Lara and Avalon Beach. Because their distance-measuring wheel had broken and a one degree mistake was made in calculations, the two leaders of the original group of six convict-companions arrived at Corio Bay, instead of the expected Western Port, discovered earlier by Flinders. From below Mt. Disappointment (Hume and Hovell's difficulties in "scrambling over brush and rock", "leeches in forest, as well as no water", "cutting grass 4-5 ft. high", dreadful scrub", "devil flies") we took an easier route, saw the Strath Creek memorial in ground fog and a wonderful "field of dreams", the Hume-Hovell privately owned cricket ground with its white picket boundary fence. Now, after a steep climb, in sunshine under gums we stretched and viewed magnificent rolling hills and fog-filled valleys - not "smoke from Aborigines' bush fires". After morning tea at Broadford we followed the Sunday Creek valley beside the Hume Freeway, passed the Wallan Wallan Rest Area (more appropriately Hume and Hovell Rest Area) to tum right at Beveridge. In Gellibrand Hill Park, near the headwaters of the Moonee Ponds Creek, we experienced the landscape the first European settlers saw - huge river red gums and rolling pastures. The gardens and sheltered courtyard of the 1840s, timber, brought from .....[?] prefabricated Woodlands Homestead, provided a pleasant lunch stop. We enjoyed a private tour, panoramic views over Melbourne and surroundings and the excitement of arriving and departing aircraft. Our next river crossing was at Werribee, "in a vast treeless plain", then we drove on by-ways no coach had previously travelled, to find "an immense sheet of water" salty Corio Bay, off-course to the west. In late afternoon of a super, calm, late autumn day we headed homewards. Back at Eltham we were rather surprised to find that we had travelled a total of 347 km. Thanks again to Russell Yeoman for his research and organization. What a wonderful day! Three colour photographsactivities, murchison gap, murchison valley -
Eltham District Historical Society Inc
Photograph, Hume and Hovell Monument, Broadford, Autumn Excursion, Hume and Hovell's 1824 expedition, 26 May 1996, 26/05/1996
... of the You Yangs to Lara and Avalon Beach. Because their distance... of the You Yangs to Lara and Avalon Beach. Because their distance ...[article by Bettina Woodburn in EDHS Newsletter No. 109, July 1996:] ON THE TRAIL OF HUME AND HOVELL - REPORT ON THE AUTUMN EXCURSION - On a green and fresh morning (Sunday 26th May 1996) the Cobb and Co coach (driven by the most obliging Peter Tampion) set off in a north easterly direction from Eltham to connect with Hume and Hovell's route on their 1824 explorations of central Victoria. The Society would follow a series of monuments erected for the 1924 centenary of the expedition from King Parrot Creek (Tuesday 7th December 1824), through Strath Creek, over Sunday Creek (Sunday 12th December 1824) at Broadford, Tullamarine, St Albans, Deer Park, through Werribee, skirting east of the You Yangs to Lara and Avalon Beach. Because their distance-measuring wheel had broken and a one degree mistake was made in calculations, the two leaders of the original group of six convict-companions arrived at Corio Bay, instead of the expected Western Port, discovered earlier by Flinders. From below Mt. Disappointment (Hume and Hovell's difficulties in "scrambling over brush and rock", "leeches in forest, as well as no water", "cutting grass 4-5 ft. high", dreadful scrub", "devil flies") we took an easier route, saw the Strath Creek memorial in ground fog and a wonderful "field of dreams", the Hume-Hovell privately owned cricket ground with its white picket boundary fence. Now, after a steep climb, in sunshine under gums we stretched and viewed magnificent rolling hills and fog-filled valleys - not "smoke from Aborigines' bush fires". After morning tea at Broadford we followed the Sunday Creek valley beside the Hume Freeway, passed the Wallan Wallan Rest Area (more appropriately Hume and Hovell Rest Area) to tum right at Beveridge. In Gellibrand Hill Park, near the headwaters of the Moonee Ponds Creek, we experienced the landscape the first European settlers saw - huge river red gums and rolling pastures. The gardens and sheltered courtyard of the 1840s, timber, brought from .....[?] prefabricated Woodlands Homestead, provided a pleasant lunch stop. We enjoyed a private tour, panoramic views over Melbourne and surroundings and the excitement of arriving and departing aircraft. Our next river crossing was at Werribee, "in a vast treeless plain", then we drove on by-ways no coach had previously travelled, to find "an immense sheet of water" salty Corio Bay, off-course to the west. In late afternoon of a super, calm, late autumn day we headed homewards. Back at Eltham we were rather surprised to find that we had travelled a total of 347 km. Thanks again to Russell Yeoman for his research and organization. What a wonderful day! Colour photographactivities, broadford, hume and hovell, monument -
Eltham District Historical Society Inc
Photograph, Hume and Hovell Monument, Autumn Excursion, Hume and Hovell's 1824 expedition, 26 May 1996, 26/05/1996
... of the You Yangs to Lara and Avalon Beach. Because their distance... of the You Yangs to Lara and Avalon Beach. Because their distance ...[article by Bettina Woodburn in EDHS Newsletter No. 109, July 1996:] ON THE TRAIL OF HUME AND HOVELL - REPORT ON THE AUTUMN EXCURSION - On a green and fresh morning (Sunday 26th May 1996) the Cobb and Co coach (driven by the most obliging Peter Tampion) set off in a north easterly direction from Eltham to connect with Hume and Hovell's route on their 1824 explorations of central Victoria. The Society would follow a series of monuments erected for the 1924 centenary of the expedition from King Parrot Creek (Tuesday 7th December 1824), through Strath Creek, over Sunday Creek (Sunday 12th December 1824) at Broadford, Tullamarine, St Albans, Deer Park, through Werribee, skirting east of the You Yangs to Lara and Avalon Beach. Because their distance-measuring wheel had broken and a one degree mistake was made in calculations, the two leaders of the original group of six convict-companions arrived at Corio Bay, instead of the expected Western Port, discovered earlier by Flinders. From below Mt. Disappointment (Hume and Hovell's difficulties in "scrambling over brush and rock", "leeches in forest, as well as no water", "cutting grass 4-5 ft. high", dreadful scrub", "devil flies") we took an easier route, saw the Strath Creek memorial in ground fog and a wonderful "field of dreams", the Hume-Hovell privately owned cricket ground with its white picket boundary fence. Now, after a steep climb, in sunshine under gums we stretched and viewed magnificent rolling hills and fog-filled valleys - not "smoke from Aborigines' bush fires". After morning tea at Broadford we followed the Sunday Creek valley beside the Hume Freeway, passed the Wallan Wallan Rest Area (more appropriately Hume and Hovell Rest Area) to tum right at Beveridge. In Gellibrand Hill Park, near the headwaters of the Moonee Ponds Creek, we experienced the landscape the first European settlers saw - huge river red gums and rolling pastures. The gardens and sheltered courtyard of the 1840s, timber, brought from .....[?] prefabricated Woodlands Homestead, provided a pleasant lunch stop. We enjoyed a private tour, panoramic views over Melbourne and surroundings and the excitement of arriving and departing aircraft. Our next river crossing was at Werribee, "in a vast treeless plain", then we drove on by-ways no coach had previously travelled, to find "an immense sheet of water" salty Corio Bay, off-course to the west. In late afternoon of a super, calm, late autumn day we headed homewards. Back at Eltham we were rather surprised to find that we had travelled a total of 347 km. Thanks again to Russell Yeoman for his research and organization. What a wonderful day! Two colour photographsactivities, hume and hovell, monument -
Flagstaff Hill Maritime Museum and Village
Functional object - Map Calipers/ Divider, Unknown
... adjustment. Or the marine dividers used to measure the distance... dividers used to measure the distance a vessel has travelled ...Compass, divider, and caliper are basically instruments that have two legs pivoted to each other at the top and are concerned with small-distance measurement or transfer. The compass and divider have straight legs; the caliper has curved legs. Dividers and Calipers were known to both the Greeks and Romans, though the caliper was uncommon. A divider with a circular sector, or wing, connecting the two legs was sketched in 1245, its modern counterpart is the wing divider with a thumbscrew clamp and screw for fine adjustment. Or the marine dividers used to measure the distance a vessel has travelled by transferring the vessels distance from a map with the divider and transferring that measurement to a marine ruler to mathematical calculate the distance.Item is believed to be a replica/ copy of a 19th century map calipers used in marine navigation to determine distance travelled. Item was probably purchased between 1972-1975 to add to the marine displays at Flagstaff Hill.Stainless steel dividers used in navigation charts. Top half is alloy plated. "W & HC" and "Made in England".flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, stainless steel dividers, steel dividers, dividers -
Flagstaff Hill Maritime Museum and Village
Tool - Ship Taffrail Log Flywheel, 1930+
... of the rotor would register on the indicator, thus measuring... of the rotor would register on the indicator, thus measuring ...The flywheel possibly belongs to a Walker's Cherub Mark III Ship-log taffrail, how the flywheel operates is a metal loop of the recording log would have been connected to the flywheel, so you could see if it was spinning properly. After the flywheel, is the rotor that was towed behind the ship and the revolutions of the rotor would register on the indicator, thus measuring the distance the vessel had travelled. Thomas Ferdinand Walker (1837–1921) first patented the Cherub log in 1878. It was one of the first logs in which the recorder was placed onboard a ship rather than being incorporated as part of the rotor. The Cherub Mark III series was produced from 1930 it came in two versions a thousand-mile which is quite rare and a five hundred-mile version.This ship log flywheel was invented and made by a significant marine instrument maker and innovator of machinery Thomas Walker. It demonstrates the huge leap taken to improve navigational accuracy at sea with an instrument that was in use for decades to measure the distance travelled at sea updated versions are in use today by mariners.Log Governor (or Fly-wheel) from a Ships Taffrail Log, metal wheel with 6 spokes, hub has rope attached for connecting to ships log. Boss the other side for attachment to the spinner.Noneflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, log governor -
Flagstaff Hill Maritime Museum and Village
Instrument - Navigational Sextant, 1882-1890
... latitude and longitude at sea by measuring angular distances... by measuring angular distances, especially the altitudes of the sun ...A sextant is an astronomical instrument used to determine latitude and longitude at sea by measuring angular distances, especially the altitudes of the sun, moon, and stars. It is a doubly reflecting navigation instrument and used mainly by sailors to measure the angular distance between two visible objects. The name comes from the Latin sextans, or “sixth part of a unit,” because the sextant’s arc can be 60° or 120° of a circle depending on the model used. The primary use was to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation. The estimation of this angle is known as sighting or shooting the object, or taking a sight. This angle and the time when it was measured is used in order to determine Greenwich Mean Time and hence longitude. Sighting the height of a landmark on land can also give a measure of distance from that object. History: The development of the sextant was as an improvement over the octant, an instrument designed to measure one's latitude. The octant was first implemented around 1731-present but can only measure angles up to 45°. As larger angles were needed to allow the measurement of lunar objects - moon, stars and the sun - at higher angles, the octant was superseded by the sextant. The sextant is a similar instrument but better made and allows larger angles from 60° to 120°. This improvement allows distances to be accurately calculated thereby giving longitude when used with a chronometer. The sextant was derived from the octant in 1757, eventually making all previous instruments used for navigational positioning obsolete. The sextant had been attributed to by John Hadley (1682–1744) and Thomas Godfrey (1704–1749), but reference to the sextant was also found later in the unpublished writings of Isaac Newton (1643–1727). Earlier links can be found to Bartholomew Gosnold (1571–1607) indicating that the use of a sextant for nautical navigation predates Hadley's implementation. In 1922, the sextant was modified for aeronautical navigation by Portuguese navigator and naval officer Gago Coutinho. It should be noted that the octant and quadrant are in the same family as they were, and all are, regarded as sextants. The sextant is representative of it's type and although not fully complete it demonstrates how 18th,19th and 20th century mariners determined their latitude and longitudinal to determine their position on a chart, allowing them to navigate there way across the world's oceans. It also demonstrates the skill and workmanship of the early instrument makers that operated scientific instrument businesses from London and other areas of England to provide most of the navigational instrumentation used by commercial and military navies of the time.Sextant with square, fitted box of polished wood, "Hezzanith" brand. Box contains many parts for the sextants use. On certificate "Heath & Co, London. Sextant Number Y 822". Catch on lid "DEFIANT LEVER" and "PATENT NUMBER 187.10". Maker's certificate is attached to the inside of the box.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, sextant box, sextant, hezzanith, heath & co, navigational instrument, george wilson heath, astronomical instrument, instrument manufacturers, scientific instrument, navigation, celestial navigation, octant, quadrant, lunar navigation -
Myrtleford and District Historical Society
Inclinometer, Early 20th Century
... and by measuring the distance on the ground to the object, trigonometry can... obtained and by measuring the distance on the ground to the object ...Provenance not clear. Leather case has 'MMBW' inscribed in black pen, indicating an association with Melbourne Metropolitan Board of Works. Item has been in the possession of Terry McCormack since 1972Hand held brass pocket inclonometer level, circa 1920. Leather case for safe storage. Semi circular graduated dial with 90 degree vernier scale with a small (20mm) magnifying glass to aid reading the vernier scale. Above the body, mounted at the rear of the graduated dial, is a spirit level tube which is tilted by finger movement to the milled hand wheel. The height to be determined is sighted through the instrument eyepiece and the bubble tube is tilted until the bubble, viewed in the mirror inside the sighting tube, is brought level with the graticule sighted at the top of the subject object. An angle is thus obtained and by measuring the distance on the ground to the object, trigonometry can be applied to determine the height of the object.Herga & Co. BRISBANE. Made in England -
Bendigo Military Museum
Photograph - RA Svy Project C4 Aerodist Operation, Eastern Arnhem Land, NT, 1967
... adapted for aircraft to accurately measure distances between non... adapted for aircraft to accurately measure distances between non ...This is a set of 30 photographs of Royal Australian Survey Corps (RA Svy) personnel from Central Comd Fd Svy Unit (Adelaide) on Aerodist survey operation - Project C4 in Eastern Arnhem Land, Northern Territory in 1967. Photos of personnel were taken either at the operations base at Numbulwar or the main base at Gove (Nhulunbuy). RA Svy conducted nineteen Aerodist operations for 12 years from 1964 to 1975. Aerodist MRC2 was a tellurometer-based system adapted for aircraft to accurately measure distances between non-intervisible ground survey stations, using the aircraft as an intermediate station. Lower order geodetic results could be achieved by survey network trilateration. The measured distances between stations formed survey networks from which each station’s latitude and longitude was computed. Aerodist MRC2 was RA Svy’s major horizontal control survey tool for mainly medium scale topographic mapping (scale 1:100,000 Class A being spatially accurate to within 50 metres) in PNG, northern NT, north-west WA, Kalimantan Barat (West) Indonesia, Sumatra Indonesia, Gulf of Carpentaria and Cape York, QLD. In 1967, the Aerodist MRC2 Master equipment was installed in the aircraft featured in this set of photos, Executive Air Services’ (Essendon VIC) Grand Aero Commander VH-EXX. It was the same aircraft type and company contracted to Division of National Mapping for Aerodist MRC2 surveys. From July to October 1967 the aircraft was attached to Central Comd Fd Svy Unit (Adelaide - Major Don Ridge) on Project C4 eastern-Arnhem Land NT, where 317 Aerodist lines measuring 17,300 line miles were successfully completed. This was the most productive Aerodist project thus far. The most common helicopter used by RA Svy up to 1972 was the civilian Bell 47G-2 and the Sioux Light Observation Helicopters (LOH), the Australian Army’s equivalent featured in this photo set. These light observation helicopters had a limiting load carrying capacity of up to about 500 pounds. By comparison, one Aerodist team including two people weighed up to 1,500 pounds. Source: Royal Australian Survey Corps – Aerodist Years 1964-1975 by Peter Jensen. This is a set of 30 photographs of Royal Australian Survey Corps (RA Svy) personnel on Aerodist survey operations in Eastern Arnhem Land, Northern Territory in 1967. The photographs are on 35mm negative film and scanned at 96 dpi. They are part of the Army Survey Regiment’s Collection. .1) to .4) - black & white, 20th August 1967, Project C4 Aerodist Operations Base - Numbulwar, NT. .5) - Photo, black & white, 1967. Probable wrecked Indonesian fishing vessel. .6) to .8) - Photo, black & white, 1967. Unidentified survey operations base, L to R: unidentified personnel. .9) - Photo, black & white, 1967. Unidentified survey operations base, unidentified soldier driving a Haflinger 4x4 Light utility vehicle. .10) - Photo, black & white, 1967. Unidentified survey operations base, L to R: unidentified technician. .11) - Unidentified technician reading two survey altimeters to compute corrections to the measured distances for atmospheric refraction and to compute the sea level distances from the slope distances aircraft to the ground stations. .12) - Photo, black & white, 1967. Unidentified survey operations base, L to R: unidentified personnel. .13) to .16) - Photo, black & white, 1967. Unidentified personnel operating remote Aerodist MRC2 ground instruments. .17) to .18) - Photo, black & white, 1967. Unknown RA Svy office location. .19) to .20) - Photo, black & white, 1967. Aerodist MRC2 Master equipment. .21) to .22) - Photo, black & white, 1967. Aero Commander VH-EXX probably at Gove, NT, Central Comd Fd Svy Unit (Adelaide) – OC Major Don Ridge. .23) to .25) - Photo, black & white, 1967. Aero Commander VH-EXX probably at Gove, NT. Unidentified personnel. .26) - Photo, black & white, 1967. Aero Commander VH-EXX probably at Gove, NT. Aerodist antenna pods are visible on the aircraft. .27) to .29) - Photo, black & white, 1967. Australian Army Sioux Light Observation Helicopter (LOH) probably at Gove, NT. .30) - Photo, black & white, 1967. Panelled U337 survey station, visible as a white cross on aerial identification photo..1P to .2P – date and location on edge of film negative. .5P to .28P – no annotations .29P - annotated in white ‘RW-JEP Gove NT’ .30P - annotated in white ‘U337 Spool No1 Jun67’royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, aerodist, surveying, central comd fd svy unit -
Flagstaff Hill Maritime Museum and Village
Ship Log, 1900-1920
... the distance traveled. The counter could measure enough miles to cover... instrument for measuring a vessel’s speed and distance traveled ...Thomas Walker & Son was internationally renowned in the manufacturing of ships logs. Founding father Thomas Walker (1805–1871), an engineer in Birmingham, patented a mechanical log in 1878 which was a recording instrument that attached to a rail at the stern of a vessel connected by a long cord with a rotor which was towed behind the ship. The instrument dial recorded the distance travelled. Thomas Walker first went into business to manufacture stoves at 58 Oxford Street Birmingham. Walker’s self-feeding stove was widely lauded at the Paris Exhibition of 1855, winning a prize medal and kick starting the first of many notable innovations for the Walker family's manufacturing business. However, it wasn’t until working on an earlier ships log model invented by his Uncle that Thomas Walker became interested in the further development of this device, used to ascertain a ship’s speed. Walker continued to improve on the common log for the company of Massey & Sons and these improvements were deemed revolutionary. This log became a firm favourite of the West India Association (British-based organisation promoting ties and trade with the British Caribbean) and the most common log in use for two generations. It took till 1861 for Thomas Walker and his son, Thomas Ferdinand Walker (1831-1921) to patent the first Walker log of many. Together, with the introduction of the A1 Harpoon Log two years later, they established the Walker Log Business as a force to be reckoned with. By the time of his passing in 1871, Thomas Walker Snr had not only founded a family business with considerable staying power but also instilled a tradition of public service. Having sat as a representative on the Birmingham Town Council for 15 years and played an active role in public works, he was soon given the nickname of ‘Blue Brick Walker’. Much like his father, Thomas Ferdinand Walker changed the face of the maritime industry. His patent of 1897, the ‘Cherub’ log, was a notable departure from the past providing a far more accurate reading and replacing the majority of logs of the age. They were the first to produce an electric log and the Walker factory was one of the first to introduce the 48 hour work week for employees. This ship log was invented and made by a significant marine instrument maker and innovator of machinery. It demonstrates the huge leap taken to improve navigational accuracy at sea with an instrument that was in use for decades. Ship Log, three analogue dials calibrated in increments of Miles, the Rocket Log is a nautical instrument for measuring a vessel’s speed and distance traveled. The floating log was drawn behind the ship over a fixed time period in order to measure the distance traveled. The counter could measure enough miles to cover the maximum distance traveled by a ship in one day. The log has two distinct parts; a brass register, made by Walker, showing the distance recorded and the rotator made by Reynolds, that spins in the water driving the counter. both parts are connected by a linked chain. The register has a cylindrical brass body approx 4.5 cm diameter containing registering mechanism with hardened steel bearings. Distance is indicated by the three pointers on enamel plate as follows: graduated every 10 miles from 0-100; every mile from 1-10; every 1/4 mile from 1/4 -1. A brass sling and eye secured to the body enables it to be attached to the taffrail. The original rotator would have had a cylindrical tapered wooden body, approx 4.5 cm in diameter with three metal alloy fins or could be all made from brass. A towing eye is fitted to the tapered end. The two pieces of apparatus are connected by a length of linked chain, length 22.9 cm."Walkers Rocket Ship-Log Birmingham (Patented)" printed on face-plate. "Made by Thomas Walker".flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, ship log, rocket log, mechanical ship log, measuring instrument, marine instrument, nautical instrument, speed recording instrument, ship log register, walker ship log, walkers rocket ship-log, thomas walker, thomas walker & son, thomas ferdinand walker, walker log business, reynolds ship log rotor, taffrail log, taff rail log, west india association -
Flagstaff Hill Maritime Museum and Village
Octant, Late 18th to mid-19th century
... primarily by sailors to measure the angular distance between two... navigation instrument used primarily by sailors to measure ...An Octant is a doubly reflecting navigation instrument used primarily by sailors to measure the angular distance between two visible objects and was a forerunner of the sextant. The name comes from the Latin octo, or “one-eighth of a circle,” for the Octant’s arc which spans 45°, or one-eighth of a circle. The primary use of an Octant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation. The estimation of this angle is known as sighting or shooting the object, or taking a sight. The angle, and the time when it was measured, can be used to calculate a position line on a nautical chart (latitude), for example, sighting the Sun at noon or Polaris at night (in the Northern Hemisphere) gives an angle by which the latitude can then be estimated. Sighting the height of a landmark on land can also give a measure of distance. History: The principle of the Octant as an instrument to measure ones latitude was first implemented around 1742-present but was superseded by the improvement of the octant to a sextant, a very similar instrument, better made and able to measure bigger angles 120°, allowing the measurement of Luna distances to give longitude when used with an accurate chronometer. The sextant started to appear around 1730 and had been attributed to by John Hadley (1682–1744) and Thomas Godfrey (1704–1749), but reference to the sextant was also found later in the unpublished writings of Isaac Newton (1643–1727). Earlier links can be found to Bartholomew Gosnold (1571–1607) indicating that the use of a Sextant for nautical navigation predates Hadley's implementation. In 1922, the sextant was modified for aeronautical navigation by Portuguese navigator and naval officer Gago Coutinho. Henry Hemsley was a lesser-known instrument maker and optician working in London in the late 17th and early 18th century. However, it should be noted that there were two Henry Hemsley opticians and instrument makers around this period. (Henry Hemsley 1, 1786-89, who had premises at 85 Fleet St London and Henry Hemsley 2, 1828-56), whose workshop was at 135-138 Radcliff Highway London. Therefore, based on the inscribed workshop address Henry Hemsley 2 is responsible for making this example.The octant is representative of its type and although not fully complete it demonstrates how 18th and 19th-century mariners determined their latitude on a chart to navigate their way across the world's oceans in the 18th and 19th century. It also demonstrates the skill and workmanship of the early instrument makers that operated from London at this time and provided most of the navigational instrumentation use by commercial and military navies of the time.Octant, ebony wooden frame and handle. Scale is missing from recess in frame. "H. Hemsley 135-138 Ratliff Highway, London", no box"H. Hemsley 135-138 Ratcliff Highway, London"flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, navigation, navigational instrument, instrument used for navigation, sextant, henry hemsley, instrument maker, london, octant -
Flagstaff Hill Maritime Museum and Village
Instrument - Octant, mid 1800's
... primarily by sailors to measure the angular distance between two... used primarily by sailors to measure the angular distance ...An Octant is a doubly reflecting navigation instrument used primarily by sailors to measure the angular distance between two visible objects and was a forerunner of the sextant. The name comes from the Latin octo, or "one-eighth of a circle," for the Octan'ts arc which spans 45°, or one-eighth of a circle. The primary use of an Octant is to measure the angle between an astronomical object and the horizon for celestial navigation. The estimation of this angle, is known as sighting or shooting the object, or taking a sight. The angle, and the time when it was measured, can be used to calculate a position line on a nautical chart (latitude), for example, sighting the Sun at noon or Polaris at night (in the Northern Hemisphere) gives an angle by which the latitude can then be estimated. Sighting the height of a landmark on land can also give a measure of distance. This fine octant once belonged to Captain Farquhar Chisholm and was donated by his granddaughter, Margaret Ruth Greer (nee Chisholm, born 1914). The label inside the Octant's box reads “Thomas L. Ainsley, Instrument Maker … etc”. Farquhar Chisholm was born in 1832 in Inverness, Scotland. He regularly sailed on perilous voyages between Quebec, Canada and the Baltic ports of Europe. In 1854 he migrated to Australia during the Gold Rush, to a place called Fiery Creek (near Beaufort Victoria) where he was fairly successful in his quest for gold. In the years of the Great Gold Rush, it was said that there were over 40,000 diggers in the goldfields of the Beaufort area! In 1857 having made sufficient money, he hired another crew and returned to Clachnacuddin, Inverness shire, Scotland and in that same year, he studied and obtained his Master Mariner Certificate (which would have included the use of an octant for navigation). He was appointed to Mr George (or James) Walker, as commander of his sailing ship, the 3-masted ELIZABETH, built 1859 and known as “The Walker barque”. In 1870 he married, then in 1887 returned to Australia with his wife and children (Kenneth Chisholm (1871), Mary Bremner Chisholm (1873), Margaret Hood Chisholm (1874), Farquhar Chisholm (1878)). They arrived in Port Melbourne, Victoria and sadly, only six weeks after landing, his wife Caroline passed away (in Geelong,1888). In 1900 Capt. Chisholm lived in Camperdown (Victoria) and not long after this his daughter Margaret died of consumption. In his later years, he went to live in the manse of St. Paul’s Presbyterian Church, Wangaratta, with his son, Rev. Farquhar Chisholm. He died there on Sat, 23rd March 1912, 80 years old. He was known as “… quiet, unobtrusive and competent, respected by all with whom he came in contact”. Some other members of Captain Chisholm’s family are; his older son Kenneth Chisholm, who was a contractor in Camperdown; a nephew Donald Macintosh (of 23 Douglas Row, Inverness); a grandson Brian Jones (son of Caroline Belle-Jones nee Chisholm, who lived in Camperdown in the earlier part of her life).The octant, the forerunner of the sextant, was a significant step in providing accuracy of a sailors latitude position at sea & his vessels distance from land when taking sightings of land-based landmarks.Octant, once belonging to Captain Farquhar Chisholm. Wedge shape (the size of an eighth of a circle), made of wood, glass and metal. Used in the 1880s. Maker’s name across centre “L. SIMON - - - SHIELDS”. Three (3) light filtering, coloured glass shades. Two (2) eyepieces. Scale attached for measuring angles. Label inside the fitted, wedge-shaped case "Thomas L. Ainsley, Optician"Label inside case "Thomas L. Ainsley, Optician" Maker’s name across centre “L. SIMON - - - SHIELDS”.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, maritime navigation, navigation instrument, migration, captain chisholm, farquhar chisholm, sailing ship, the elizabeths, thomas l. ainsley, l. simons, shields england, octant, john hadley, chisholm -
Federation University Historical Collection
Scientific Instrument, Induction Coil
An induction coil consists of two coils of insulated copper wire wound around a common iron core. One coil, called the primary winding, is made from relatively few (tens or hundreds) turns of coarse wire. The other coil, the secondary winding, typically consists of many (thousands) turns of fine wire. An electric current is passed through the primary, creating a magnetic field. Because of the common core, most of the primary's magnetic field couples with the secondary winding. The primary behaves as an inductor, storing energy in the associated magnetic field. When the primary current is suddenly interrupted, the magnetic field rapidly collapses. This causes a high voltage pulse to be developed across the secondary terminals through electromagnetic induction. Because of the large number of turns in the secondary coil, the secondary voltage pulse is typically many thousands of volts. This voltage is often sufficient to cause an electric spark, to jump across an air gap separating the secondary's output terminals. For this reason, induction coils were called spark coils. The size of induction coils was usually specified by the length of spark it could produce; an '8 inch' (20 cm) induction coil was one that could produce an 8 inch arc. (http://en.wikipedia.org/wiki/Induction_coil)A metal and plastic object on a timber stand. In an induction coil the distance between the plates is often used to measure the voltage of the spark since the air breaks down at 30 000 volts per centimetreballarat college of advanced education, scientific instrument, induction coil, scientific instruments, electricity -
Federation University Historical Collection
Book, Bennett H. Brough, A treatise on Mine-Surveying, 1904
... , measurement distances, the chain, rods, steel bands, measuring wheel... deposits, mining terms, measures of length, measurement distances ...The author, Bennett H. Brough was an associate of theRoyal School of Mines, a member of the COuncil of the Institution of Mining Engineers, a fellow of the geological society and of the Institute of Chemistry, a member of the Mining Institute of Cornwall, and a former instructor of mine-surveying at the Royal School of MinesRed had covered book 372 pages - part of Griffin's Mining Series. Contents include general explanatinos of surveying, an historical sketch, mineral deposits, mining terms, measures of length, measurement distances, the chain, rods, steel bands, measuring wheel, Miner's Dial, Magnetic needle, Fixed needle, German Dial, theodolite, traversing underground. Surface-surveys. plotting the survey, calculation of area, leveling, Telescope, Setting out, Mine-Surveying Problems, Mine Plans, Photographic Surveying, examination Surveying. Illustrations include: Whitelaw's Dial (Fig 22), Theodolite of the American Type with Hoffman tripod head, (fig 37a)mining, surveying, miner's dial, chain, survey, theodolite, scientific instruments -
Federation University Historical Collection
Equipment - Scientific Instrument, Tangent Galvanometer
Used for measuring electric current. It works by using a compass needle to compare a magnetic field generated by the known current to the magnetic field of the Earth.A "compass rose" type of horizontal full-circle scale, with 4 0-90 unit quandrants. Balanced, free-floating needle. Located centrally wired to a vertical coil. Horizontal distance scales, one each side and perpendicular to the core. All mounted on polished wood base, equipped with 3 terminal posts. Materials: glass, wood, metal.elementary, physics, experiment, galvanonometer, ballarat school of mines, scientific instruments -
Flagstaff Hill Maritime Museum and Village
Head Rod, Dring & Fage, c. 1901
The Australian Customs Service, Melbourne, donated a set of gauging instruments, and Port Fairy Customs donated another instrument, the Sike’s Hydrometer, to Flagstaff Hill Maritime Village, all of which were no longer required. However these ullaging tools were in use for many years by Customs officials, called Gaugers. Ullaging is a term describing the measurement of the amount of liquid remaining in a container of spirits such as a cask or barrel. It can also measure the free space or head space remaining. The primary role of customs officers in Victoria was to calculate the tariff or excise duty payable on goods imported into Victoria. (Excise duty is a tax on goods produced within a country, and customs duty is imposed on imports.) Customs officers spent a great deal of their time measuring and weighing goods, and then calculating the amount of duty to be paid by the importer. The tariffs for different products varied, and officers consulted published lists. Calculating the duty payable on a barrel of brandy was a detailed task. The gauger had to measure the barrel to determine its volume. Barrels were irregular in shape, and finding the volume required several measurements and checking tables of figures. Alcoholic content was then measured with a hydrometer. The duty paid varied according to the alcoholic strength of the spirits. Uniform national customs and excise duties were operative in Australia from October 1901. These tools were still being used in Australia in the 1950’s. The Federal Government still imposes excise taxes on goods such as cigarettes, petrol, and alcohol. The rates imposed may change in February and August each year in response to changes in the consumer price index. ULLAGING TOOLS (1) Head Rod - this instrument measures the diameter of the heads (top and bottom ends) of a cask or barrel. The shaped brass pieces on the head rod enable the diameter of a barrel to be measured inside the chimes at the head end. The slide rule could then be used to calculate the internal volume of the barrel. On the reverse side is a set of ullaging scales, used like those on any ullaging rule, to calculate the volume of liquid in a partially filled barrel. (2) Bung Rod – this instrument measures the diameter of a cask or barrel when it is lying on its side. It is a rod that fits into the ‘bung’ hole of a cask and is long enough be extended to reach the opposite side of the cask. The brass sliding pointer can be moved to mark the ‘wet’ line. When the rod is removed the bung measurement can be read from the scale on the rod. (3) Long Calipers - this instrument measures the length of the cask between the heads. It has two rules sliding beside each other, each end having another piece of wood fixed firmly at right angles downwards then turned inwards at the ends so as to reach over the heads of the casks without touching the projecting ends. The centre pieces enable it to extend or contract, changing the distance between the two other parallel sides, the distance they are apart being shown by the rule on the sliding pieces. (4) Cross Calipers – this instrument is used to take the bung diameters of casks, or "the Cross " as it is called. This instrument has two rules sliding beside each other, each end having another piece of wood fixed firmly at right angles downwards, together forming a 3 sides of a rectangle with the centre pieces enabling it to extended or contracted, changing the distance between the two other parallel sides, the distance they are apart being shown by a the rule on the sliding pieces. (5) Sike’s Hydrometer – this instrument is used to gauge the strength of different alcoholic spirits when fitted with the different weights in the set. Every set is individually calibrated to ensure that it meets the exact Standard Weight and Measure compliance, then every piece in that set is stamped with the same number by the Calibrator, to ensure that the measurements are taken using the same hydrometer set. [References: A Handbook of Practical Gauging, Janes Boddely Keene of H.M. Customs, 1861, F. Pitman, London; Customs Act, Volume 2, No. 1, April 1999; Old Customs House website ] Head Rod, ullaging gauge. Long wooden rod made of three joined sections, brass hook on end, sliding centre section with hook, measurements marked along each section as on a slide rule. Used for measuring diameter of heads of casks in order for Customs to calculate excise (tax) on the contentsflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, head rod, gauging rod, ullaging rods, measuring instruments, customs tax -
Bendigo Military Museum
Photograph - Johnson Ground Elevation Meter (JGEM) Survey Vehicle - Army Survey Regiment, Fortuna, Bendigo, c1960s
This is a set of 16 photograph of the Royal Australian Survey Corps’ Johnson Ground Elevation Meter (JGEM) Survey Vehicle taken at the Army Survey Regiment, Fortuna, Bendigo. The JGEM vehicle was extensively used by RA Svy within Australia from the late 1960s. A limited number of Ground Elevation Meter (GEM) station wagon type vehicles were manufactured by General Motors Corporation (GMC) in the USA for the United States Geological Survey, Canada’s mapping agencies, RA Svy and National Mapping (Natmap). The GEM was a four-wheel drive, four-wheel steer vehicle. Four-wheel steering was necessary to avoid systematic errors caused by non-tracking of front and rear wheels on conventionally steered vehicles. The manufacturer substituted the rear axle with a front axle and connected them to form the four-wheel steering mechanism. The two Australian GEM vehicles, referred to as Johnson GEMs (JGEMs) were converted into right-hand drive. After delivery in 1964, acceptance Natmap and RA Svy testing and operator training was undertaken at the Army's School of Military Survey located at Balcombe, Victoria. A small fifth wheel was mounted on a cantilever arm suspension midway between the front and rear wheels on the right side of the vehicle. It was lowered to and raised from its operating position by use of a constant pressure air cylinder. A telescopic bar, suspended between the front and rear axles, provided the reference datum for the angle measurement. The wheel provided the velocity or distance signal through a pulse generator system. A sensitive pendulum mounted on this bar provided the angle measurement for each minute distance traversed. The JGEM contained electromechanical instruments used to determine relative elevations, by trigonometric principles, along a traversed path. These relative elevations were obtained through apparatus which measures the instantaneous angle of inclination of the road and the instantaneous velocity of the meter along such a path. Road routes over which the JGEM operated were planned so that each started and ended as near as practicable to an existing point of known elevation (formally referred to as a level traverse bench mark). The difference in height from the bench mark and the road surface alongside the JGEM’s fifth wheel was measured with a level and staff. Along each route, mapping control photo reference points where new elevation values were required were identified on aerial photographs. Under favourable conditions it was possible to survey as much as 160km in an ordinary working day. The first of RA Svy’s JGEM operations was undertaken in 1:250,000 scale map areas of Queensland. CPL John Hook was the JGEM’s main operator in the early 1970s undertaking operations covering 1:250,000 scale map blocks over northern Victoria and central NSW, each requiring 36 points (9 runs of photography and 4 points across. SPR Lyn Thompson and SPR Bob McDonagh teamed with CPL Hook on some of these JGEM operations. When RA Svy was integrated into the Royal Australian Engineers in 1996, the JGEM vehicle with the Survey Corps collection was donated to its museum. It is believed to be the last of the original manufactured fleet in existence. The JGEM has undergone extensive refurbishment to achieve roadworthiness and is currently housed at The Australian Army Museum of Military Engineering, Hoslworthy Barracks, NSW. It can be viewed by making an appointment with the museum’s curator.This is a set of 16 photograph of the Royal Australian Survey Corps’ Johnson Ground Elevation Meter (JGEM) Survey Vehicle taken at the Army Survey Regiment, Fortuna, Bendigo. The photographs were on 35mm slide film and were scanned at 96 dpi. They are part of the Army Survey Regiment’s Collection. .1) - Photo, colour, c1960s, Johnson Ground Elevation Meter (JGEM) Survey Vehicle .2) - Photo, colour, c1960s, JGEM instrumentation, on-board computer. .3) - Photo, colour, c1960s, JGEM instrumentation. .4) - Photo, colour, c1960s, JGEM instrumentation, on-board computer. .5) - Photo, colour, c1960s, JGEM tyre pressure controller .6) - Photo, colour, c1960s, JGEM rear doors, SGT Geoff Briggs. .7) - Photo, colour, c1960s, JGEM 5th wheel distance/angle measurement device in lowered position, SGT Geoff Briggs. .8) - Photo, colour, c1960s, JGEM 5th wheel distance/angle measurement device in lowered position. .9) & .10) - Photo, colour, c1960s, JGEM tyre pressure system, SGT Geoff Briggs. .11) - Photo, colour, c1960s, JGEM tyre pressure system. SGT Geoff Briggs. .12) - Photo, colour, c1960s, JGEM levelling scope, levelling staff, unidentified technicians. .13) & .14) - Photo, colour, c1960s, JGEM levelling scope, unidentified technician. .15) & .16) - Photo, colour, c1960s, probably survey operation adjusted height plotted on block base sheet. .1P to .16P - Some of the equipment is annotated on the frame of the 35mm slides.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying -
Tatura Irrigation & Wartime Camps Museum
Photograph, Cattanach Canal, 1957
Taken by the photographer for Victoria State Rivers and Water Supply Commission.Large sepia photograph - large stretch of water in foreground, men leaning down from platform above measuring weir in middle of photograph - trees on bank left and middle distance.Above photo: "Cattanach Canal / Inlet and Measuring Weir to Waranga Basin."irrigation, victoria state rivers and water supply commission, cattanach canal, waranga basin, measuring weir -
Creswick Campus Historical Collection - University of Melbourne
Equipment, Ranging 120
... Black case with lens and scale. For measuring 2 - 30m... Black case with lens and scale. For measuring 2 - 30m distance ...Black case with lens and scale. For measuring 2 - 30m distance, height, width. In original cardboard box.Equipment -
Flagstaff Hill Maritime Museum and Village
Octant, Mid to late 19th Century
An octant is an astronomical instrument used in measuring the angles of heavenly bodies such as the sun, moon and stars at sea in relation to the horizon. This measurement could then be used to calculate the altitude of the body measured, and then the latitude at sea could also be calculated. The angle of the arms of an octant is 45 degrees, or 1/8 of a circle, which gives the instrument its name. Two men independently developed the octant around 1730: John Hadley (1682–1744), an English mathematician, and Thomas Godfrey (1704–1749), a glazier in Philadelphia. While both have a legitimate and equal claim to the invention, Hadley generally gets the greater share of the credit. This reflects the central role that London and the Royal Society played in the history of scientific instruments in the eighteenth and nineteenth century's. There were also two others who are attributed to having created octanes during this period, Caleb Smith, an English insurance broker with a strong interest in astronomy (in 1734), and Jean-Paul Fouchy, a mathematics professor and astronomer in France (in 1732) In 1767 the first edition of the Nautical Almanac tabulated lunar distances, enabling navigators to find the current time from the angle between the sun and the moon. This angle is sometimes larger than 90°, and thus not possible to measure with an octant. For that reason, Admiral John Campbell, who conducted shipboard experiments with the lunar distance method, suggested a larger instrument and the sextant was developed. From that time onward, the sextant was the instrument that experienced significant development and improvements and was the instrument of choice for naval navigators. The octant continued to be produced well into the 19th century, though it was generally a less accurate and less expensive instrument. The lower price of the octant, including versions without a telescope, made it a practical instrument for ships in the merchant and fishing fleets. One common practice among navigators up to the late nineteenth century was to use both a sextant and an octant. The sextant was used with great care and only for lunar sightings while the octant was used for routine meridional altitude measurements of the sun every day. This protected the very accurate and pricier sextant while using the more affordable octant for general use where it performs well. The invention of the octant was a significant step in providing accuracy of a sailors latitude position at sea and his vessels distance from land when taking sightings of land-based landmarks.Octant with metal handle, three different colored shades are attached, in wooden wedge-shaped box lined with green felt. Key is attached. Two telescope eyepieces are in box. Some parts are missing. Oval ink stamp inside lid of box, scale is graduated to 45 degrees. Ink stamp inside lid of box "SHIPLOVERS SOCIETY OF VICTORIA. LIBRARY"instrument, flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, octant, navigation, nautical instrument, navigation instrument, john hadley, sextant, astronomical instrument -
Flagstaff Hill Maritime Museum and Village
Instrument - Letter Scale, Late 19th Century
Before 1851, letters sent through the mail were charged by the number of sheets it contained and the distance it travelled. For example, a letter consisting of one sheet of paper was charged the single rate; a double letter, that is two sheets, was charged double the single rate, a treble letter, was charged three times the single rate, and so on. In other words, each additional sheet of paper increased the charge by one rate. In Great Britain. Sealing a letter in an envelope effectively put an end to postal clerks' ability to count the number of sheets in a letter and an alternative method of determining the postage had to be found. Overweight mailings had previously required the items to be weighed but with the introduction of the Uniform Penny Postage act of 1839, the public could mail a letter not exceeding a half-ounce in weight within the United Kingdom for one penny if prepaid, or two pence if paid on delivery. At about the same time that the adhesive postage stamps and envelopes made their appearance, postal administrations began to experiment with strategically placed street letter boxes, known as pillar boxes because of their round, pillar-like shape, that permitted the public to mail letters from a place other than from a post office. For all these reasons, the use of postal scales became the nucleus of every post office. Scales had been in use since ancient Egyptian times so their use for everyday commerce was not unusual in the 1800s. What was new in 1840 was their ubiquitous use throughout the postal system. No post office could function effectively without one. Although the earliest scales used in post offices did not differ markedly from the ones in general use as time went on they were adapted specifically for postal use. For example, a paper sleeve, also known as a weight sticker, was attached that showed the applicable rate of postage for any given weight. This innovation was quite a time saver as postal clerks no longer needed to weigh the item first and then refer to a separate chart to determine the required postage for that particular weight. Victorian postal scales were used in village Post offices in the late 19th century, of which there are many examples today for sale. No maker can be attributed to the manufacture of the item. Postal scales with weights,. Balance scale has brass fittings and is mounted on a rectangular wooden stand, with depressions for brass weights; which measure 1/2oz, 1oz, 2oz, "Young Aton REL., C.N.0.9."flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, scales and weights, balancing scales, postal scales, letter scale -
Flagstaff Hill Maritime Museum and Village
Ship Log, 1900-1920
The Excelsior IV Log is a nautical instrument for measuring a vessel’s speed and distance travelled. When navigating a ship it is essential to be able to estimate the boat’s speed and distance travelled to determine its position at sea. In times past the only way to measure a ship’s speed was to throw a wood log into the water and observe how fast it moved away from the ship. In the 16th century, the log was fastened to a rope knotted at set intervals. The log was thrown over the stern (back) of the vessel and a crew member counted the number of knots that were paid out in a set time. From this, they could estimate the speed of the vessel through the water. This was known as streaming the log and is also the derivation of the knot as a measurement of nautical speed. The Walker’s Excelsior Mark IV instrument was designed for smaller vessels, such as yachts, launches and fishing vessels. Historical: Thomas Walker & Son was internationally renowned in the manufacturing of ships logs, founding father , Thomas Walker (1805–1871), an engineer in Birmingham, patented a mechanical log in 1878 which was a recording instrument that attached to a rail at the stern of a vessel connected by a long cord with a rotor which was towed behind the ship. The instrument dial recorded the distance travelled. Thomas Walker first went into business to manufacture stoves at 58 Oxford Street Birmingham. Walker’s self-feeding stove was widely lauded at the Paris Exhibition of 1855, winning a prize medal and kick starting the first of many notable innovations for the Walker family's manufacturing business. However, it wasn’t until working on an earlier ship’s log model invented by his Uncle that Thomas Walker became interested in the further development of this device, used to ascertain a ship’s speed. Walker continued to improve on the common log for the company of Massey & Sons and these improvements were deemed revolutionary. This log became a firm favourite of the West India Association (British-based organisation promoting ties and trade with the British Caribbean), being the most common log in use for two generations. It took until 1861 for Thomas Walker and his son, Thomas Ferdinand Walker (1831-1921) to patent the first Walker log of many. Together, with the introduction of the A1 Harpoon Log two years later, they established the Walker Log Business as a force to be reckoned with. By the time of his passing in 1871, Thomas Walker Snr had not only founded a family business with considerable staying power but also instilled a tradition of public service. Having sat as a representative on the Birmingham Town Council for 15 years and played an active role in public works, he was soon given the nickname of ‘Blue Brick Walker’. Much like his father, Thomas Ferdinand Walker changed the face of the maritime industry. His patent of 1897, the ‘Cherub’ log, was a notable departure from the past providing a far more accurate reading and replacing the majority of logs of the age. They were the first to produce an electric log and the Walker factory was one of the first to introduce the 48 hour work week for employees. The ship log was invented and made by a significant marine instrument maker and innovator of machinery. It demonstrates the huge leap taken to improve navigational accuracy at sea with an instrument that was in use for decades.Ship's Taff Rail Log, rope attached. Walker's Excelsior IV Log model. Nautical miles dials: units and 10's. "Walker's Excelsior IV Log", "Made in England by Thomas Walker, Birmingham"flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, log register, taff rail log, taffrail log, marine navigation, a1 harpoon log, cherub’ log, walker’s excelsior mark iv log, ship’s log instrument, mechanical ship’s log, measure ship’s speed, nautical instrument, navigation instrument, massey & sons, thomas walker, blue brick walker, thomas walker & son, thomas ferdinand walker, 48 hour work week -
Flagstaff Hill Maritime Museum and Village
Instrument - Ship Log, early to mid-1800s
The ship's log part, called a fish, is likely to be from a mechanical taffrail log system. It was recovered from the wreck site of the barque, the 1840-1852 Grange. There are no marks on the fish to identify its maker or model. It is part of the John Chance Collection. This ‘fish’ is part of an early to mid-1800s ship's log. It would likely have been part of a taffrail log connected to a rotor (also called propeller, spinner) by a strong line, and the other end connected by a line to a dial mounted on the taffrail, or stern rail, at the stern of the vessel. As the propeller rotated through the water it would spin the log, which in turn would cause a number to register on the dial, showing the current speed in knots; one knot equals one nautical mile per hour. TAFFRAIL LOGS A taffrail log is a nautical instrument used for measuring the speed of a vessel, providing vital navigational information to be calculated, such as location and direction. A log has been used to measure the speed of a vessel since the 1500s. A simple piece of wood was tied to a long line and thrown into sea at the back of the vessel. The rope was knotted all along at equal distances apart. On a given signal the log line was pulled back into the vessels, the knots counted until the log came up, then the figures were calculated by a navigator In 1802 the first successful mechanical log available for general use was invented by Edward Massey. It had a rotor 'V' section connected to a recording mechanism. The water’s movement rotated the rotor, which intern sent the movement to the recorder. There are examples of this invention available to see in some of the maritime museums. Thomas Walker, nephew of Edward Massey, improved on Massey’s design, and Walker and his son took out a patent on the A1 Harpoon Log. In 1861. Both Massey and Walker continued to improve the designs of the taffrail log. New designs were still being introduced, even up to the 1950s. THE GRANGE, 1840-1858- The wooden barque ’Grange’ was a three-masted ship built in Scotland in 1840 for international and coastal trade. On March 22, 1858, the Grange set sail from Melbourne under Captain A. Alexander, carrying a cargo of ballast. The barque had left the Heads of Phillip Bay and was heading west along the Victorian coast towards Cape Otway. The ship struck Little Haley’s Reef at Apollo Bay due to a navigational error and was stuck on the rocks. The crew left the ship carrying whatever they could onto the beach. Eventually, the remains of the hull, sails and fittings were salvaged before the wreck of the Grange broke up about a month later. About 110 years later, in 1968, the wreck of the Grange was found by divers from the Underwater Explorers Club of Victoria. They were amazed to find a unique, six to nine pound carronade (type of small cannon) and a cannonball on the site. There have been no other similar carronades recorded. In that same year the anchor of the Grange was recovered by diver John Chance and Mal Brown. The ship’s log is significant historically as an example of hardware used when building wooden ships in the early to mid-19th century. The ship’s log is historically significant as an example of the work and trade of blacksmith. The ship’s log also has significant as it was recovered by John Chance, a diver from the wreck of the Grange in the 1968. Items that come from several wrecks along Victoria's coast have since been donated to the Flagstaff Hill Maritime Village’s museum collection by his family, illustrating this item’s level of historical value. The ship’s log is historically significant for its association with the 1840s wooden barque, the Grange. The Grange is an historical example of a Scottish built vessel used for international and coastal trader of both cargo and passengers in the mid-19th century. The Grange is an example of an early ship, designed with a wooden hull. It is significant as a ship still available to divers along the south coast of Victoria, for research and education purposes. The Grange is an example of a mid-19th century vessel that carried a weapon of defence onboard. Ship log fitting, called a fish; part of a brass navigational instrument, likely to be from a taffrail log. The metal is a tan colour and has rough surface with a sheen, and discolouration in places. Its basic shape is a hollow cylinder with ends tapering to a smaller size. In the centre there are opposing openings cut out, showing a rough texture inside. One end on the cylinder is closed with a ring and shank installed, fixed by an embedded screw through the end of the cylinder. There are no inscriptions.flagstaff hill, warrnambool, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, west coast trader, apollo bay, mid-19th century shipwreck, the grange, scottish barque, little henty reef, captain a alexander, underwater explorers club of victoria, vhr 5297, coastal trader, wooden shipwreck, john chance, wooden ship, taffrail log, marine instrument, marine technology, navigation, nautical instrument, mechanical log, nautical navigation, navigation equipment, scientific instrument, ship log, ship log register, ship speed, taff rail log, patent log, towed log, taffrail log fish, edward massey, thomas walker -
Flagstaff Hill Maritime Museum and Village
Instrument - Dividers, 1930-1955's
... . Used to measure and mark reoccurring distances. This set..., adjustable with wingnut to hold in place. Used to measure and mark ...This set of dividers was used for measuring and marking details in the planning making of components for the ship model Sovereign of the Seas. It is part of a collection of objects used by Jim Williams, maker of fine ship models from about 1930-1955. Most of the components for the models, as well as many of the tools, were handmade by Jim Williams. Jim’s family has donated the ship model “Sovereign of the Seas” and many tools, accessories and documents used in the making of this and other ship models have been donated to Flagstaff Hill Maritime Village. Ship model of HMS Sovereign of the Seas, scale model of 17th Century English war ship, was handmade and carved from plans, enclosed in airtight glass case. All components of that model, including even the smallest pulleys, were hand crafted using tools designed and made by Jim. Outstanding details include functional rigging and moving cannons. Please see our record 3732 of the mode Sovereign of the Seas for further details of the ship and the maker.This set of dividers is connected with the hobby and skill of ship model making that has been crafted as a leisure activity for many generations. The hobby is often chosen by serving and retired mariners who appreciate the connection with maritime history. These dividers were used by local Warrnambool man, Jim Williams, who was employed at Cramond and Dickson clothing store, and then at Fletcher Jones menswear for 27 years. It was used in making components for the model of the historic ship, the Sovereign of the Seas. The Sovereign of the Seas was a historic 17th century English war ship with important maritime heritage. Dividers, metal, adjustable with wingnut to hold in place. Used to measure and mark reoccurring distances. This set of dividers is part of a collection of tools and accessories once used by Jim Williams, maker of a series of ship models 1930-1955 including “HMS Sovereign of the Seas”.flagstaff hill, warrnambool, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, jim williams, james bernard williams, ship model hobby, ship model tools, ship model making equipment, ship model making accessories, technical drawing instrument, dividers for drawing and measuring, set of dividers, sovereign of the sea, ship model, hobby, ship model tool, english war ship, measuring instrument -
Flagstaff Hill Maritime Museum and Village
Tool - Spar gauge, Mid-to-late 20th century
... . This spar gauge is an expanding gauge. It measures multiple equal... is an expanding gauge. It measures multiple equal distances at the same ...Boat builders and shipwrights use a spar gauge to transfer measurements and shapes onto their workpiece, particularly if they are working on a curved surface, like an oar or the hull of a boat. This spar gauge is an expanding gauge. It measures multiple equal distances at the same time, allowing for decreased work time on the job at hand. The tool is similar to a ‘toy’ designed in Australia in the 1960s called a Sketch-A-Graph, derived from the mathematics and mechanics of a ‘pantograph’. The shipwright’s tools on display in the Great Circle Gallery are connected to the maritime history of Victoria through their past owner, user and donor, Laurie Dilks. Laurie began his career as a shipwright in the mid-1900s, following in the wake of the skilled carpenters who have over many centuries used their craft to build and maintain marine vessels and their fittings. You can see Laurie’s inscription on the tool called a ‘bevel’. Laurie worked for Ports and Harbours, Melbourne, for over 50 years, beginning in the early 1960s. He and a fellow shipwright inscribed their names on a wheelhouse they built in 1965; the inscription was discovered many decades later during a repair of the plumbing. Many decades later Laurie worked on the Yarra moving barges up and down the river and was fondly given the title ‘Riverboat Man’ His interest in maritime history led him to volunteer with the Maritime Trust of Australia’s project to restore and preserve the historic WWII 1942 Corvette, the minesweeper HMAS Castlemaine, which is a sister ship to the HMAS Warrnambool J202. Laurie Dilks donated two handmade displays of some of his tools in the late 1970s to early-1980s. The varnished timber boards displayed the tools below together with brass plaques. During the upgrade of the Great Circle Gallery Laurie’s tools were transferred to the new display you see there today. He also donated tools to Queenscliffe Maritime Museum and Clunes Museum.The shipwright’s tools on display in the Great Circle Gallery are connected to the maritime history of Victoria through their past owner, user and donor, Laurie Dilks. Laurie began his career as a shipwright at Ports and Harbours in Melbourne in the mid-1900s, following in the wake of the skilled carpenters who have over many centuries used their craft to build and maintain marine vessels and their fittings.Spar gauge; a drawing tool with four flat brass bars, pointed at one end, are joined in such a way that they can expand and contract. The rounded ends of the two long bars are joined. The centres of the two shorter bars are crossed and joined. Each rounded end of a shorter bar is joined to one of the long bars towards the top of the bar. All of the joints swivel, allowing the gauge to expand and contract. It once belonged to shipwright Laurie Dinks.flagstaff hill, warrnambool, great ocean road, shipwreck coast, maritime museum, maritime village, shipwright, carpenter, shipbuilding, ship repairs, hand tool, equipment, ship maintenance, cooper, tool, marine technology, gauge, shipwright's gauge, spar gauge, laurie dilks, l dilks, port and harbours melbourne -
Bendigo Military Museum
Photograph - Royal Australian Survey Corps Electronic Distance Measuring Equipment Demonstration, c1960s
... Survey Corps Electronic Distance Measuring Equipment ...This is a set of five photographs of CAPT James ‘Jim’ Leslie Stedman in the field demonstrating the setup of prisms used as electric distance measurement (EDM) receiver reflectors for tellurometer equipment and the sighting of a large surveyor’s light. This equipment was deployed in establishing mapping and geodetic control operations. The photos were most likely taken in the late 1950s or early 1960s. The tellurometers of this era were man-portable systems that improved geodetic survey efficiencies for rapid network extension and densification replacing triangulation with EDM and theodolite traverse sometimes using Bilby Towers to extend line lengths. Jim Stedman later reached the rank of Colonel, was Director of Military Survey from 1975 to 1978 and was appointed as Colonel Commandant (honorary appointment, Retd) of the Royal Australian Survey Corps from 1978 to 1983. Jim Stedman is demonstrating EDM equipment. See item 6180.16P, photos .14) to .16) for more information and photos of Jim Stedman’s EDM demonstration. This is a set of five photographs of a surveyor in the field demonstrating electric distance measurement (EDM) equipment. c1950s – 1960s. The photographs were printed on photographic paper and are part of the Army Survey Regiment’s Collection. The photographs were scanned at 300 dpi. .1) to .2) - Photo, black & white, c1960s, CAPT Jim Stedman demonstrating the sighting of a large surveyor’s light. .3) to .5) – Photo, black & white, c1960s, CAPT Jim Stedman demonstrating EDM prism equipment. .1P to .5P on back – CAPT Stedman EDM Eqpt.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying -
Queenscliffe Maritime Museum
Equipment - Ships Log Measuring Rotator
... line and governor to record distance travelled. Ships measuring ...Used by all ships until replaced by more modern methods after c.1960. Used with clock recorder, log line and governor to record distance travelled.Ships log rotator and connecting eyeInsignia, T W Cherub 245, T Walker and Son Ltd. Birmingham Englandships measuring log -
Queenscliffe Maritime Museum
Tool - Navigation, ship's Log, 25 May 2011
A Ship's Log looked very similar to a torpedo but was used to measure the speed of a ship. When dragged behind the vessel, movement of water past the propeller caused it to rotate, turning the small needle dials to record the distance and speed travelled. https://museumsvictoria.com.au/immigrationmuseum/resources/journeys-to-australia/Ship's Log Display HeadWalkers Cherub 111 ships lognavigation, speed, knot, chip log, log, thomas walker and son -
Churchill Island Heritage Farm
Photograph - Photograph of five peopple
Churchill Island Heritage Farm has a large photograph collection dating from the nineteenth century.Colour photograph of five people, with two holding a white tape measure, and two in the background pointing into the distance. A clapboard building is visible in the background.8 11:47 [red timestamp on image on lower right hand side] catalogue number on reverse in pencilchurchill island, photograph -
The Ed Muirhead Physics Museum
Becquerel Phosphoroscope (incomplete), c1860-1880
The phosphoroscope was invented by Alexander Edmund Becquerel and used to measure the amount of time that a phosphorescent substance will glow after being irradiated by a brilliant source of light.The phosphoroscope consists of a round metal chamber with a pair of rotating discs inside, arranged so that no light can pass directly through the chamber. The discs have cut-out windows spaced equally at regular angular distances and are turned by the hand crank linked to a gear mechanism. The sample is placed in a specially designed holder into the small opening near the gearing, and it is exposed to the light source through the large rear condensing lens.Engraved on chamber: 'Phosphoroscope de E. Becquerel / J. Duboscq a Parisbecquerel phosphoroscope, phosphoroscope, optical instruments, phosphorescent, alexander edmund becquerel, jules duboscq, france