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

A blue coloured cardboard cover. the information is written in black ink. Top right hand corner is the number five which has been written in black texta. Une this is W.O. Code No. 9726. Part of the top half of the cover is faded. There are three punch holes and two metal staples down the left hand side. Also contains Amendments No. 1 which is held together by a metal staple and is inside of the booklet. Top right hand corner reads 7610-66-013-9800/1. Under this reads W Code No 9726-2 (Aust) and this amendment is done by Army Headquaters, Canberra on the 1 Sep. 68. There are three punch holes down the left hand side of the amendment.australia - armed forces - service manuals, british army, artillery instruments, distance measuring equipment, tellurometer

A blue coloured cardboard cover. the information is written in black ink. Top right hand corner is the number four which has been written in black texta. Une this is W.O. Code No. 9726. The top half of the cover is faded. There are three punch holes and two metal staples down the left hand side. Also contains Amendments No. 1 which is held together by a metal staple and is inside of the booklet. Top right hand corner reads 7610-66-013-9800/1. Under this reads W Code No 9726-2 (Aust) and this amendment is done by Army Headquaters, Canberra on the 1 Sep. 68. There are three punch holes down the left hand side of the amendment.australia - armed forces - service manuals, british army, artillery instruments, distance measuring equipment, tellurometer

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. Refer to Item 9061.26P for more photos taken during this Aerodist survey operation.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. Survey operations base, L to R: unidentified (x3), W01 Pat Wood BEM, unidentified. .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

This is a set of 26 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 .4P to .26P) and in Western Arnhem Land, Northern Territory in 1968 (photos .1P to .3P). 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. In 1968, after completion of the Kimberley Aerodist Operation project, the Aerodist system in VH-EXX was immediately deployed to western-Arnhem Land NT for Central Comd Fd Svy Unit (Adelaide - Major Don Ridge) to complete the mapping control across northern NT from mid-July to October. The Aerodist MRC2 Remote antenna seen in Photos .24P to .26P is mounted on a 20 foot pole tower. The antenna direction was controlled by wires/ropes to the two arms under the dish at right angles. The antenna elevation could be changed to the vertical for aircraft height checks as seen in photo .25P. Source: Royal Australian Survey Corps – Aerodist Years 1964-1975 by Peter Jensen. Refer to Item 6449.30P for more photos taken during these Aerodist survey operations.This is a set of 26 photographs of Royal Australian Survey Corps (RA Svy) personnel on Aerodist survey operations in Eastern Arnhem Land, Northern Territory in 1967 and Western Arnhem Land, Northern Territory in 1968. The photographs are on 35mm negative film and scanned at 96 dpi. They are part of the Army Survey Regiment’s Collection. .1) to .2) – Photo, black & white, 1968, unidentified soldier with an opened can of food, possibly bully beef. .3) – Photo, black & white, 15 Aug 1968, aerial view of terrain taken from a helicopter in vicinity of MILINGIMBI SIERRA. .4) – Photo, black & white, 1967, aerial view of an island taken from a helicopter. .5) & .6) – Photo, black & white, 1967, unidentified soldier driving a Haflinger 4x4 Light utility vehicle with trailer. .7) – Photo, black & white, 1967, unidentified surveyors taking vertical measurements with a leveling instrument and staff. .8) – Photo, black & white, 1967, Australian Army Sioux Light Observation Helicopter (LOH) with float removed. .9) to .11) – Photo, black & white, 1967, Australian Army Sioux Light Observation Helicopter (LOH) with floats. .12) – Photo, black & white, 1967, civilian Bell 47G-2 helicopter (Australian Army Sioux LOH equivalent) refuelled. .13) – Photo, black & white, 1967, survey station on coastline surrounded by white plastic aerial photographic identification panels lined with rocks. .14) & .15) – Photo, black & white, 1967, soldier (possibly a signaller from RA Sigs) operating a radio. .16) – Photo, black & white, 1967, Central Comd Fd Svy Unit Operations Section tent, Main Base Gove (Nhulunbuy) L to R: SPR Harry Dunn, WO1 Pat Wood BEM. .17) – Photo, black & white, 1967, Central Comd Fd Svy Unit Operations Section tent, Main Base Gove (Nhulunbuy) L to R: unidentified, WO1 Pat Wood BEM. .18) – Photo, black & white, 1967, Central Comd Fd Svy Unit Operations Section, Main Base Gove (Nhulunbuy), unidentified Australian Army Catering Corps cook preparing meals. .19) – Photo, black & white, 1967, Central Comd Fd Svy Unit Operations Section, Main Base Gove (Nhulunbuy) mess tent in readiness for meals. .20) – Photo, black & white, 1967, Bank of batteries in transit boxes undergoing recharging using generators. .21) – Photo, black & white, 1967, A topographic survey identification plaque set in a concrete block being weighed using a set of scales hanging from slaughtering gallows. .22) – Photo, black & white, 1967, CPL (Geoff or Gary) Larkin operating the remote Aerodist MRC2 ground instrument at Veronica Island, located north of Nhulunbuy. .23) – Photo, black & white, 1967, L to R: CPL (Geoff or Gary) Larkin with unidentified surveyor operate the remote Aerodist MRC2 ground instrument at Venica Island, located north of Nhulunbuy. .24) & .25 – Photo, black & white, 1967, The Aerodist MRC2 Remote antenna. .26) – Photo, black & white, 1967, The Aerodist MRC2 Remote antenna.The following photos are annotated in black ink on edge of film negative: .3P – ’15 Aug ’68, 2000’, 1-C18 ’68 MILINGIMBI SIERRA’ .4P – ’U462’ .8P – ‘1-C3/67 Float Removed’ .13P – ‘U477 10-C3/67 .20P - ‘2-C3/67 Bank of Chargers’ .21P - ‘3-C3/67 Gallows & Scales’ .22P - ‘0462 VERONICA ISLAND NT, CPL Larkin’ .23P - ‘0462 VERONICA ISLAND NT’ .24P - ‘4-C3/67 20’ Aerodist Tower’ .25P - ‘5-C3/67 20’ Aerodist Tower’ .26P - ‘6-C3/67 20’ Aerodist Tower’royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, aerodist, surveying, central comd fd svy unit

This is a set of 1photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating electric distance measurement equipment. They were probably employed in establishing mapping and geodetic control operations or the surveyors may have been in training. The photos were most likely taken in the 1950s and 1960s. Photos .1P to .6P feature personnel setting up geodetic survey chaining equipment to measure distances. The surveyor in Photo .5P is LTCOL Howard Angus Johnson MBE who served from 1936 to 1954. The RA Svy surveyor in photos .7P to .12P were using a theodolite to take angular measurements. They were usually supported by an observer who recording their readings on a booking form. The surveyor in Photo .10P and .11P is LTCOL Jorge Gruszka, who served from 1955 to 1985. He was CO of the Army Survey Regiment from 1982 to 1985. The surveyor in photo .13P is cutting an identification blaze on a tree using a hammer and chisel. The tellurometer in Photos .14P to .16P was a MRA1 microwave Electronic Distance Measuring instrument (EDM) introduced in 1958. It and later models 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. The surveyor with the slouch hat is Colonel James ‘Jim’ Leslie Stedman, who served from 1941 to 1978. He 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.This is a set of 17 photographs of surveyors in the field measuring distances using chains, taking observations using theodolites and operating 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) - Photo, black & white, c1950s, unidentified personnel using geodetic survey chaining equipment. .2) to .4) - Photo, black & white, c1950s, geodetic survey chaining equipment. .5) – Photo, black & white, c1950s, Jim Stedman using geodetic survey chaining equipment to measure distances. .6) - Photo, black & white, c1950s, Unidentified personnel geodetic survey chaining equipment. .7) – Photo, black & white, mounted on card, c1950s. Unidentified surveyor undertaking observations on a coral reef using a theodolite. .8) – Photo, black & white, c1950, unidentified surveyor undertaking observations with a Tavistock theodolite. .9) – Photo, black & white, mounted on green card, c1950s. Unidentified surveyor undertaking observations using a plane table. .10) – Photo, black & white, c1955, Jorge Gruszka undertaking observations with a theodolite. 7/55 Basic Survey Course Balcombe. .11) – Photo, black & white, c1950s, Jorge Gruszka undertaking observations with a theodolite. .12) – Photo, black & white, c1946-1948, unidentified surveyor undertaking observations with a theodolite to gain control for the mapping of the Snowy Mountain Diversion Scheme. .13) – Photo, black & white, c1950s, unidentified surveyor cutting a blaze in a tree. .14) and .15) – Photo, black & white, c1960s, Jim Stedman demonstrating EDM equipment. .16) – Photo, black & white, c1960s, L to R: Jim Stedman (probably) and unidentified surveyor demonstrating EDM equipment. .17) – Photo, black & white, 1956, Operation Cutlass - Surveyors SPR W. Crane and J.A. Campbell undertaking observations with a theodolite in extreme conditions..1P on back - First Order Chaining Equipment .2P on back - First Order Chaining Equipment .3P on back - Full catenary 1800 – 1960 replaced by EDM .4P on back - First Order Chaining Equipment .5P on back - H.A. Johnson, Benambra baseline? 1st Order Chaining .6P on back - Chaining .7P on front - Difficult observing conditions especially when the tide is in. The station is sighted (sic) on a coral reef. .8P on back - Tavistock. .10P on back of duplicate in Photo Folder 14 – George (sic) Gruszka 7/55 Basic Survey Course Balcomme (sic) 1955/56 .14P and .15P on back - Jim Stedman demonstrating early EDM equipment.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, surveying

Vintage opisometer used for measuring distances on maps. Part of the Kevin John Herdman, No. 397661, Collection. See Catalogue No. 5942P for details of his service record..1) Circular chromed metal instrument with handle. Calibrated dial with black markings and hand on a white background. Reverse face has unit conversion details in black text on white background. Each face is covered with a convex glass lens. On the opposite end to the handle is a small wheel with milled edge. As it turns, the hand on the front dial turns to measure distance. .2) Rigid plastic rectangular storage case in two parts. Base is yellow, top is clear..1) Printed on front dial: 'INCHES, MADE IN FRANCE'. Printed on back dial: 'Unit conversion details'. Stamped on metal near wheel: 'DEPOSE, H(logo)B'. .2) Stamped on clear cover: 'CURVIMETRE, MAP MEASURER, H(logo)B, MADE IN FRANCE'.map, map measure, equipment, opisometer, kevin john herdman

This flexible measuring tape was used by the SEC Victoria in the mid to late 1900's. It was in a period before digital measuring instruments were in use. This is a 33ft long tape measure and would have been used by the construction workers when building the Kiewa Valley Hydro System. The warning details (embossed into the leather covering) was to warn users to be careful not to use the tape near live electricity terminals or linkages. This tape was produced mainly for wooden structures and not electricity conductive material. This was during the 1950's to 1960's.This imperial tape measure is very significant to the Kiewa Valley as it was used in the construction of the Kiewa Valley Hydro Scheme of the 1950's-1960's. It provides evidence that small measuring equipment used in the construction and the continuing maintenance of the scheme was of the imperial measure and used by construction workers who remained and settled in the town of Mount Beauty and Kiewa Valley long after the construction period. This flexible metallic measuring tape (33 ft in length) is contained in a round circular leather bound container. It has brass fittings (winder and tape guide) and is stitched with heavy grade twine. The tape measure is graduated in feet and inches on one side and yards on the other. Embossed in the leather casing"MADE IN ENGLAND" and around the inner circle "HOCKLEY ABBEY" and "JOHN RABONE & SONS"imperial tape measure, distance measures, imperial tools

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

Before metric measurement was introduced land was measured by a tool of chains and links called a surveyor's chain. The first surveyor's chain was designed by the English clergyman and mathematician Edmund Gunter (1581-1626) and introduced in 1620. It comprised of a metal chain made up of 100 links measuring a precise overall length of 66 ft or 22 yards, with each link measuring 7.92 inches (201.168 mm). The Gunter's chain was originally intended to be used in the accurate laying out and measurement of plots of land, for legal and commercial purposes, but was subsequently widely used by surveyors throughout the British Empire and Europe, with an Imperial mile being 80 times the Gunter's chain length. A tool used to survey the land before the introduction of the metric system.Surveyor chain Gunter type, 100 links measuring 66 feet in length. Hand grips at each end of chain. Wire links are approximately eight inches long. Incised tags or markers are attached to each tenth link of chain to assist with the more accurate recording of intermediate distances.surveying tool

From Scarborough Maritime Heritage Centre: A Yacht Log was 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. In 1878, Thomas Ferdinand Walker (1837–1921), an engineer in Birmingham, patented a mechanical log in which a recording instrument was 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. The 'Log' at the Heritage Centre was recovered from a skip in Scarborough and was one of the first artefacts collected by the volunteer group. It is made of brass with a ceramic dial, with the main scale marked from 0 to 100 nautical miles and an inset dial marked from 0 to 10 miles. It has a fixing plate, on which it can turn, with which it would have been attached to the 'taffrail', the rail at the stern of a ship, usually on the starboard side. The Walker’s Excelsior Mark IV instrument was designed for smaller vessels, such as yachts, launches and fishing vessels. Its exact date of manufacture cannot be determined but this design was manufactured in the first half of the 20th century. These mechanical logs have now been superseded by electronic equipment such as GPS navigation instruments.This instrument was made by a significant nautical instrument manufacturer and demonstrates the innovation needed at the time for improved navigation and safety at sea.Timber Box containing an instrument for measuring speed and distance. There is a brass, cased log with a white enamel dial. It also includes a towing cord and cylindrical rotator. The box has paper labelling on the front and also the inside of the lid. The label on the inside of the lid has instructions for use. Although the lid is hinged it has broken off and is separate. The hinges remain attached.Enamel Dial: Walkers Patent Excelsior Yacht Logmaritime, maritime history, tool, navigational tool, navigational instrument, navigation, sailing, walkers, maritime technology, walker & son

In 1941, the scientific instrument manufacturing firms of  Henry Hughes & Son Ltd, London, England, and  Kelvin Bottomley & Baird Ltd, Glasgow, Scotland, came together to form Kelvin & Hughes Ltd. Kelvin Company History: The origins of the company lie in the highly successful and strictly informal relationship between William Thomson (1824-1907), Professor of Natural Philosophy at Glasgow University from 1846-1899 and James White, a Glasgow optical maker. James White (1824-1884) founded the firm of James White, an optical instrument maker in Glasgow in 1850 and was involved in supplying and mending apparatus for Thomson university laboratory and working with him on experimental constructions. White was declared bankrupt in August 1861 and released several months later. In 1870, White was largely responsible for equipping William Thomson laboratory in the new University premises at Gilmore hill. From 1876, he was producing accurate compasses for metal ships to Thomson design during this period and this became an important part of his business in the last years of his life. He was also involved in the production of sophisticated-sounding machinery that Thomson had designed to address problems encountered laying cables at sea, helping to make possible the first transatlantic cable connection. At the same time, he continued to make a whole range of more conventional instruments such as telescopes, microscopes and surveying equipment. White's association with Thomson continued until he died. After his death, his business continued under the same name, being administered by Matthew Edwards (until 1891 when he left to set up his own company. Thomson who became Sir William Thomson and then Baron Kelvin of Largs in 1892, continued to maintain his interest in the business after James White's death. In 1884 raising most of the capital needed to construct and equip new workshops in Cambridge Street, Glasgow. At these premises, the company continued to make the compass Thomson had designed during the 1870s and to supply it in some quantity, especially to the Admiralty. At the same time, the firm became increasingly involved in the design, production and sale of electrical apparatus. In 1899, Lord Kelvin resigned from his University chair and became, in 1900, a director in the newly formed limited liability company Kelvin & James White Ltd which had acquired the business of James White. At the same time Kelvin's nephew, James Thomson Bottomley (1845-1926), joined the firm. In 1904, a London branch office was opened which by 1915 had become known as Kelvin, White & Hutton Ltd. Kelvin & James White Ltd underwent a further change of name in 1913, becoming Kelvin Bottomley & Baird Ltd. Hughes Company History: Henry Hughes & Sons were founded in 1838 in London as a maker of chronographic and scientific instruments. The firm was incorporated as “Henry Hughes & Sons Ltd” in 1903. In 1923, the company produced its first recording echo sounder and in 1935 a controlling interest in the company was acquired by S Smith & Son Ltd resulting in the development and production of marine and aircraft instruments. Following the London office's destruction in the Blitz of 1941, a collaboration was entered into with Kelvin, Bottomley & Baird Ltd resulting in the establishing “Marine Instruments Ltd”. Following the formal amalgamation of Kelvin, Bottomley & Baird Ltd and Henry Hughes & Sons Ltd in 1947 to form Kelvin & Hughes Ltd. Marine Instruments Ltd then acted as regional agents in the UK for Kelvin & Hughes Ltd who were essentially now a part of Smith's Industries Ltd founded in 1944 and the successors of S. Smith & Son Ltd. Kelvin & Hughes Ltd went on to develop various marine radar and echo sounders supplying the Ministry of Transport, and later the Ministry of Defence. The firm was liquidated in 1966 but the name was continued as Kelvin Hughes, a division of the Smiths Group. In 2002, Kelvin Hughes continues to produce and develop marine instruments for commercial and military. G. Falconer Company History: G Falconer (Hong Kong Ltd) appear to have had a retail presence in Hong Kong since 1885, according to the company website, and currently have a shop in the Peninsula Hotel. G Falconer was the Hong Kong selling agent for several British companies. Ross Ltd of 111 New Bond St London was one and the other was Kelvins Nautical Instruments. Falconers were primarily watchmakers, jewellers and diamond merchants.They were also agents for Admiralty Charts, Ross binoculars and telescopes, and sold English Silverware and High Class English Jewellery. In 1928 the company was operating from the Union Building opposite the Hong Kong general post office. It is unclear if the item is an original Sextant made by Kelvin prior to his amalgamation with Henry Hughes & Sons in 1941 as Kelvin appears to have only made compasses up to this date. If the Sextant can be established that it was made by Kelvin then it is very significant and a rare item made for and distributed through their Hong Kong selling agents G Falconer Ltd. There are many Sextants advertised for sale stating "Kelvin & Hughes 1917 model sextant". These can be regarded as replicas as the company was not formed until 1941 and production of marine instruments was not fully under way until after the war in 1947. Further investigation needs to be undertaken to accurately determine the provenance of this item. As the writer currently has the impression that the subject object was possibly made by Kelvin and Hughes in the mid to late 20th century or is a replica made by an unknown maker in the late 1970s. Purchased as an exhibition of marine navigational instruments for the Flagstaff Hill museum. The Sextant is a brass apparatus with filters and telescope lens, and comes with a wooden felt lined storage box. It is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.G Falconer and Co. Hong Kong (retailers of nautical equipmentflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, sextant, kelvin & hughes ltd, hong kong, navigational instrument, g falconer, mariner's quadrants

This sextant is very similar to a 1915 Sextant design. A sextant is an astronomical instrument used in measuring angular distances especially the altitudes of sun, moon and starts at sea determining latitude and longitude.This sextant is an example of a 19th-century marine instrument used for finding location at sea. It was made by London scientific instrument maker Troughton and Simms, which originated in 1826 and continued until 1922.Sextant and its fitted square wooden box. The handle of the sextant is carved with a cross-hatched pattern. Made by Troughton and Simms, London.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, sextant, navigational instrument, marine navigation, marine equipment, instrument, navigation, troughton and simms, london, scientific instrument

Used to measure the depth/distance of the uterus. Uterine sounds are particularly useful for ensuring safe and accurate IUD placement.This is one of a collection of items received from the practice of Dr Lachlan Hardy-Wilson, FRCOG, Launceston, Tasmania.Disposable uterine sound in sterile sealed packaging. Label inside packaging reads 'Mark-7 brand of disposable uterine sound/ONE STERILE UNIT/NO. 154'. Label also includes manufacturer information, a sterile packaging warning, and a caution about sale of the item being restricted to physicians. The number '026' is printed on the back of the packaging.intrauterine device

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