This item was most probably used at the Ballarat School of Mines. Pajari Instruments Ltd. grew from a partnership established in 1945 when the first EX-AX surveying instrument that provided accurate azimuth and inclination was made available to the diamond drilling industry. The partnership between Charles Trotter and George Pajari Sr. was known as Trotter-Pajari Instruments and the EX-AX Instrument was dubbed the "TROPARI" by the diamond drilling industry. Charles Trotter, a mechanical engineer, was also a marketing genius who developed substantial demand in Australia, Africa and South America in the 1940's and early 1950's. In fact the sales to each of these continents exceeded those to North America during those early years. Pajari is located in Orillia, Ontario, Canada and offer services and products that assist customers with their individual requirements. After the death of Charles Trotter in 1956, George Pajari Sr. with the assistance of his wife Hilda continued the business under the title of Pajari Instruments. George Sr. set most of the tenets that comprise our present Mission Statement. If it wasn't user friendly or if it had to have experts to operate it, that instrument design was doomed. If the customer wasn't getting good value in his opinion, manufacturing and repair procedures were examined to see where efficiency could be improved to cut costs without sacrificing Quality. George Pajari Jr and his wife Darlene assumed the reins of Pajari Instruments Ltd. in 1981 when George Sr. decided on semi-retirement. George Jr. brought the "client geologist's" perspective to the company. The company moved from Toronto to a 30 hectare (80 acre) site near Orillia shortly afterward. This site provided the high magnetic latitude earth field environment without magnetic pollution that is necessary for accurate compass setting. The park like setting of this location is a positive psychological benefit for our staff. George Sr. passed away in 2002 being preceded by Hilda only by 3 months, George Jr. continues at the helm of the company. With dedication from long term employees/contractors and third generation family members, Pajari Instruments Ltd. continues operations/new product development in Orillia. (http://www.pajari.com/about.html) Brass levelling compass in green velvet lined hinged timber box. Known as a Tropari - a single-shot, micro-mechanical borehole surveying instrument operated by a timing device. Borehole direction is measured from the earth's magnetic field. The Tropari provides both direction and inclination which can be used to define the attitude of the borehole at the survey depth. Regular surveys at intervals as the borehole progresses will allow a plot of the borehole to be drawn from the data. The Tropari is easy to use and maximizes profits by minimizing capital and operational costs. The Basic Survey Train Consists of: PDSI / Tropari Container, 6m (20 ft) Nonmagnetic Rods, Impact Foot, and Connector at Top. (http://www.pajari.com/tropari.html) A sticker on the lid of the hinged box states: "A.E. Parsons 107 Leicester St., Carlton 3053 Telephone 347 5844"scientific instrument, compass

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

This is a set of 23 photographs of surveyors and support staff in the field undertaking tasks in New Guinea 1956 – 1957. The surveyors were employed in the establishment of mapping and geodetic control for Project Cutlass, the “Ship-Shore” survey of the New Ireland province. In this survey operation surveyors used theodolites to observe horizontal and vertical angles and chains to measure base line distances between survey stations. Bob Skitch shown in photo .7P was in the 2nd year of his career in the Australian Army. He achieved the rank of Lieutenant-Colonel, and his last appointment was the CO of the Army Survey Regiment from 1976 to 1980.This is a set of 23 photographs of surveyors and support staff in the field undertaking duties during Project Cutlass located in New Ireland, New Guinea 1956 – 1957. 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, colour, 1956. Surveyors travelling main road from Kavieng to Namatanai, New Ireland. .2) - Photo, colour, 1956. Unidentified surveyors assessing recovery of their vehicle after bridge collapsed on west side of New Ireland. .3) - Photo, colour, 1956. Unidentified surveyors assessing recovery of their vehicle after bridge collapsed over flooded creek on west side of New Ireland. .4) - Photo, colour, 1956. Survey personnel L to R: Bev Uwins, John Lambie, Bob Thompson, New Ireland. .5) - Photo, colour, 1956. Survey base camp, New Ireland. .6) - Photo, black & white, 1956-1957. Geoff Helsham with possible human remains, New Ireland. .7) - Photo, black & white, 1956-1957. Bob Skitch undertaking survey observations using Wild T2 theodolite, New Ireland. .8) - Photo, black & white, 1956-1957. Chas Beach undertaking survey observations using Wild T2 theodolite, New Ireland. .9) & .10) - Photo, black & white, 1956-1957. Kev Parker (cook) New Ireland. .11) - Photo, colour, 1957. Brian Berkery taking a break, Top Manor Island, Lihir Island Group off New Ireland. Latitude -2° 46”, Longitude 152° 40”. .12) - Photo, colour, 1957. Survey base camp L to R: Chas Beach, Bev Uwins, Feni Islands, New Ireland. Latitude -4° 05”, Longitude 153° 45”. .13) - Photo, colour, 1957. A Hous Kiap. (Kiaps, known formally as district officers and patrol officers, were travelling representatives of the British and Australian governments), New Ireland. .14) & .15) - Photo, colour, 1957. L to R: Joe Farrington, Tom Royle Bob undertaking survey observations using theodolites from an improvised timber tower, New Ireland. .16) & .17) - Photo, colour, 1957. US Army ship FS216 used for ship-to-shore triangulation docked at Rabaul, New Britain. .18) - Photo, colour, 1957. US Army ship FS216 used for ship-to-shore triangulation docked at Kavieng, New Ireland. Sight target on top of mast. .19) - Photo, colour, 1957. Survey personnel onboard US Army ship FS392, L to R: Peter Frodsham, Bob Thompson, Doc Reid, John Underwood, remainder unidentified, New Ireland. .20) - Photo, colour, 1957. Survey base line party heading ashore, New Ireland. .21) - Photo, colour, 1957. Survey personnel rowing US Army assault boat L to R: Kev Parker, Chas Beach, folded up survey beacons overhanging stern, New Ireland. .22) - Photo, colour, 1957. Les Bailey onboard US Army ship departing Rabaul, New Britain for Brisbane. .23) - Photo, colour, 1957. Ron Newman onboard US Army ship departing Rabaul, New Britain for Brisbane. Active volcano in background..1P to .23P annotated on back – ‘Operation Cutlass’, personnel names, the year and the location. royal australian survey corps, rasvy, army survey regiment, fortuna, a, army svy regt, asr, surveying

This technical textbook is the nineteenth edition of the book by Henry Raper, Lieutenant in the Royal Navy with awards that include F.R.A.S. (Fellow of the Royal Astronomical Society) and F.R.G.S. (Friend of the Royal Geographical Society). The book is dedicated in honour of Rear-Admiral Sir Francis Beaufort K.C.B., Hydrographer to the Admiralty. He was awarded the title K.C.B. (King's Commander) as a Member of the Order of Bath, an order of British Chivalry, The book was first published in 1840 and soon became a resource for navigation students. It includes topics on nautical navigation, astronomy, navigation charts, calculations and mathematical tables, time, tides, ships, longitude, and position at sea. Thomas A. Hull, who revised and expanded this edition, was a Commander in the Royal Navy and had previously been Superintendent of Admiralty Charts used for navigation worldwide by seamen from many walks of life. The publisher, J D Potter of London, was at that time the sole agent for the Admiralty Charts produced by the Royal Navy. Printer Spottswoode and Co.,. was established by William Strachan in 1738. In 1819 his nephews A and R Spottswoode took over the business and bought premises in New-Street Square and Shoe Lane. In 1850 over 200 workers were employed by the firm. and five years later the business became Spottswoode & Co. Andrew Spottswoode invented the Spottswoode Press.This technical book was very popular as a textbook for students of maritime navigation, written and updated by members of the British Royal Navy and relied upon for accurate advice and information. The first edition was published in 1840, this edition was updated, expanded and published in 1891 when ports around the world were filling with travellers, merchants and business people. Title: The Practice of Navigation and Nautical Astronomy Author: Henry Raper, Lieut, R.N., F.R.A.S., F.R.G.S. Nineteenth Edition, revised and enlarged by Commander Thomas A. Hull, R.N., Late Superintendant of Admiralty Charts Dedication: To Rear-Admiral Sir Francis Beaufort K.C.B. Publisher: J D Potter, London, sole agent for the sale of Admiralty Charts Printer: Spottswoode and Co. New-Street Square, London Date: 1891 Small leather hardcover book with gold embossed text and lines on the spine. The Dedication in the book is as follows: - "To Rear-Admiral Sir Francis Beaufort K.C.B. Hydrographer to the Admiralty. Sir, The eminent station which you occupy in the naval scientific world renders it highly gratifying to me to dedicate the following Work to you as a testimony of my regard and esteem; while the general accordance of my views on the subject with those of your more experienced judgement, gives me the greater confidence in laying my labours before the Public. I have the honour to be, Sir, Your obedient servant, HENRY RAPER"flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill, warrnambool, flagstaff hill maritime village, book, navigation, nautical astronomy, hydrography, nautical charts, nautical navigation, astronomical navigation, admiralty charts, henry raper, thomas a. hull, royal navy, j d potter, royal astronomical society, royal geographical society, calculations, mathematical tables, longitude, latitude, nautical time, location at sea, position at sea, maritime, practical navigation, spottswoode and co., sir francis beaufort, k.c.b., rear-admiral sir francis beaufort, hydrographer to the admiralty, scientific book, naval science

EXHIBITION in the DOME The Sea is All Around Us - Margaret Woodward 11-21 May 2015 Dome Gallery – Mission to Seafarers, 717 Flinders Street, Melbourne, Australia. 37 º 49'21" S 144º 57'03"E Hours: Daily 11.00am - 4.00pm The sea is all around us is a multi-layered event which will create a memorable experience for those visiting the Dome Gallery and the Mission to Seafarers in Melbourne’s Docklands. The event will acknowledge and raise awareness of the working lives and journeys of seafarers by making visible their role in transporting commodities, materials and objects to and from Australia’s shores. This installation invites seafarers and visitors to participate in a global project which aims to witness sea journeys and trace the mobile life of seafarers and souvenirs. For a fortnight in May 2015, the Dome Gallery will become an architectural large scale compass, with the circular floor marking the intersection of its latitude and longitude (37 º 49'21" S 144º 57'03"E). Over these two weeks the Dome Gallery will be inscribed with marks recording journeys made by seafarers, recording destination and departure ports, home lands and waterways, and in doing so making visible a small segment of the global patterns of seafaring. Custom-made souvenirs designed for the installation will be given to seafarers as gestures of welcome and a memento of their visit. The souvenirs originating in Poland will continue their journey by sea, to destinations beyond the Dome becoming part of the global network of seafaring, with an invitation for seafarers to record their future journeys using QR code scanning technologies. It is hoped that by releasing the 200 limited edition souvenirs accompanying the seafarers the mobile life of souvenirs and seafarers will also become visible. For more information visit the website: sensingtheremote.net Margaret Woodward is Associate Professor of Design at Charles Sturt University For a fortnight in May 2015, Margaret Woodward was ‘in residence’ at the Mission to Seafarers Norla Dome Gallery with her participatory installation project "The Sea is All Around Us". The floor of the gallery became a large scale compass. Seafarers were welcomed to the gallery their ships, journeys and destinations were recorded and mapped on the floor drawing. Seafarers were welcomed with cake and souvenir mugs of tea. These mugs, a momento for the seafarers, were inscribed with a scannable QR code and an invitation for seafarers to record their journeys on a dedicated project website. Around 120 souvenirs are now continuing their journey by sea and seafarers have scanned the mugs from locations including Singapore, Brisbane, Fremantle, Adelaide, Busan and Johor! After the exhibition Margaret Woodward was able to follow the seafarers' whereabout: ""The Sea is all Around Us". I am in awe of where this project might go, well done Margaret. One week has passed since finishing up at the Mission to Seafarers Victoria. Today I check my website and can see that the cup-carrying seafarers are reaching warmer climates, they tell me it’s getting hot as some are already in Suva and Port Lautoka. I’ve watched the souvenirs travel and fan out from Melbourne, some West to Adelaide and Fremantle, others going north to Sydney Brisbane, Singapore and Busan. Another seafarer scans in from Changi Airport, excited to be going home for some time with his family in the Phillipines. I keep an eye on my ‘fleet’ of 22 ships that visited the Dome Gallery, and see where they are on the Live Shipping website, watch some of them sail up the coast of Western Australia and marvel at the steady pace this journey takes. I am so used to flying over coastlines and countries in a matter of hours, impatiently watching the tracking screen from my airline seat, this shipping pace seems so much more real, so much more of a passage. I feel connected to these ships, to the people on board, to know that an object has passed from my hands to theirs, now holding in it my cargo of concern."margaret woodward, installation, exhibition, norla dome, 2015, sea voyage, sea journey, cultural events

This document, also referred to as a word picture or Tablet, is framed in glass and timber with gilt trim, is handwritten with colour highlights. The penned letters rest on ruled guide lines, decorated where the lines intersect. The writing gives a description of the state of Borough of Warrnambool around 1875; its location, the area it covers, its population, Harbour and facilities, public buildings and institutions, imports and exports, financial worth, number of houses, connection with other areas of the Colony. A possible reason and origin for the document is found in an article ‘Link with US Exhibition’ from the Warrnambool Standard of December 19, 1981, written by local historian Bruce Morris. The writer mentions that the Warrnambool Borough Council met on 15th June 1875 and recorded a letter from G.C. Levey , secretary to the Melbourne group of commissioners representing the Colony, and Victoria in particular, for the Philadelphia Centennial Exhibition of 1876. The letter asks Council to provide “statistics as to the population, social condition and commercial and industrial state of the district in and around Warrnambool.” A sub committee was formed for the project. The Mayor, Cr. Thomas King, wrote and signed a Report, presented to the council on July 14, 1875, in which “The Committee … begs to recommend that a Tablet be prepared setting for the particulars respecting the following matters relating to the Borough”. The matters included area, population, annual income, churches, schools, other public buildings, societies and companies, general description of houses erected, and returns of exports and imports for 1874. The minutes note that the Report was adopted. The article above also notes the opinion of Warrnambool printers who have examined the document; it is almost certainly to be an old lithograph, which means there could be several copies. It is possible that there may be a copy in Melbourne and another in Philadelphia. It is interesting to note that (1) the quoted location co-ordinates are for an “Unnamed Road, Packsaddle NSW 2880, Australia”, and that the DMS co-ordinates for Warrnambool’s Council Offices differ, being 38.23.9.12 South, 142.28.52.887. (2) the date for “Exports and Imports for the Year Ending 30th June 1875” is different to the period mentioned by Cr. King in the sub committee’s Report of recommendation “returns of exports and imports for 1874”. The information required to have the figures for the end of June 1875 would need to have been compiled very quickly for the Tablet to be ready for the opening of the Philadelphia Exhibition on 10 May 1876. The document/certificate shows the following – - - - - - - - - - - - - - - -- - - - - - - - - - - - - - -- - - - - - - - - - - - - - -- - - - - - - - - - - - - - - “Victoria Australia, Borough of Warrnambool. Latitude, 30.24.50 South, Longitude 142.32 East The Principal Port in the Western District of the Colony and the Centre of its Choicest Agricultural Lands. Established a Municipality in 1855, and Created a Borough 1863. Population in 1875 4,500. Warrnambool is the nearest Port to Melbourne on the Western Seaboard, being about 160 miles distant. Coaches run to and from the Metropolis daily, in connexion [connection] with the Railway of Geelong and Steamers belonging to Local Companies sail between Melbourne, Warrnambool, Belfast [renamed Port Fairy], and Portland several times weekly. The Harbour is known as Lady Bay, and is partially protected by a reef of rocks stretching from the mouth of the Hopkins River. The formation of a Breakwater has been decided upon by the Government, to extend 600 yards, at an estimated cost of £100,000. There are two substantial Jetties, one of 800 and the other of 600 feet in length. The former is connected with the Town by means of a Tramroad, along which Goods, inwards & outwards, are conveyed, & the latter has been constructed solely for the purpose of facilitating the transit of material for the formation of the Breakwater. In addition to the trade of the Borough and District, the principal Townships up country receive their supplies from Melbourne and ship their exports through Warrnambool. Potatoes form the staple produce of the district, and the richness of the soil can be estimated by the fact that the Government Statistics for 1875 give as the average yield a return of Seven Tons to the acre. Several thousand acres between Warrnambool and Tower Hill are now being laid down in Potatoes by Tenants who have leased the lands at rates up to £5 per acre for the season 1875-6. Wool, Tallow, hides &c are also largely exported, while the shipments of all descriptions of Farm Produce are annually increasing. Area of Borough, 3362 Acres. Net Annual Value £27,000. Annual Revenue £5,500. Number of Houses in Borough 800. Public Buildings and Institutions Churches. Church of England, Roman Catholic, Presbyterian, Wesleyan, Congregational and Baptist. Schools. Three State Schools, average attendance nearly 1000. New Building in course of erection. Several private establishments. Banks. Bank of Australasia, Bank of Victoria, National Bank, Colonial Bank and Savings Bank. Public Buildings. Court house, Custom house, Post & Telegraph Offices, Survey & Land Offices, Shire £, Town Hall, Mechanics Institute, Volunteer Orderly Room, Odd Fellows Hall, Hospital & Benevolent Asylum, Temperance Hall &c. Companies & Societies. Steam Navigation Co, Woolen Mill Co, Gas Co, Racing Club, Amateur Turf Club, Agricultural Society, Farmers’ Club, Cricket Club, Anglers’ Society, Building Society, Freemasons Odd Fellows, Foresters, Druids, Hibernians. Protestant Alliance, Rechabites, Sons of Temperance, &c, Fire Brigade &c. --- Exports and Imports for the Year Ending 30th June 1875 –-- --Exports Total Tonnage 27,800 (Calculated at the Current Warrnambool Market Prices) Potatoes Wool Wheat Barley Hides Skins Fowls Butter Cheese Eggs Tallow Leather Ale Pigs Sheep Sundries --Imports 13,000 Tons Of the Estimated Value of £520,000 Total Tonnage of Exports and Imports 40m900 Tons, Value £806,627 Passenger Travels, to ad from Warrnambool during year, 10,000 persons Revenue from all sources paid through Warrnambool Sub Treasury From 1860 to June 1875 £1, 292, 300 Thomas King [signed] Mayor Henry T Read [signed] Town Clerk” - - - - - - - - - - - - - - -- - - - - - - - - - - - - - -- - - - - - - - - - - - - - -- - - - - - - - - - - - - - - The document is of historical, social, economic and local significance in that it summarises activities, business, community, trade, travel and government at a point in time in Warrnambool’s history – 30th June 1875.Document, also referred to as a ‘word picture’ or ‘tablet’. Document is framed in glass and timber with gilt trim, handwritten with colour highlights. The penned letters rest on ruled guide lines, decorated where the lines intersect. Document outlines the establishment of Warrnambool as a Municipality in 1855 and Borough in 1863, with a population of 4,500 in 1875. It states geographic location, public buildings and institutions, harbor facilities and imports and exports for the year ending 30th June 1875. Two signatures "Thomas King" Mayor and "Henry T Read" Town Clerk. It shows the Coat of Arms of the Borough of Warrnambool.Signatures - "Thomas King" Mayor and "Henry T Read" Town Clerk. Warrnambool Coat of Arms; “British Coat of Arms, above sailing vessel and sheaf of wheat in sun, motto “By these we flourish” and around circumference “Borough of Warrnambool 1855”flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, borough of warrnambool, municipality of warrnambool, document borough of warrnambool 1875, word picture of warrnambool 1875, tablet of borough of warrnambool 1875, statistics borough of warrnambool 1875, lithograph borough of warrnambool 1875, coat of arms warrnambool, warrnambool city motto – in these we flourish, establishment of warrnambool, warrnambool history, thomas king mayor of warrnambool, henry t read town clerk of warrnambool, warrnambool breakwater, warrnambool jetty, warrnambool imports and exports 1875, warrnambool agriculture 1875, warrnambool business 1875, warrnambool population 1875, centennial exhibition philadelphia 1876, framed certificate

Green cloth hardcovered book of 384 pages. Includes photographic and line illustrations.signed inside cover "K.H. Wilkie 1935"geography, k.h. wilkie, marie bentivoglio, f.f. fiederich, solar system, atmosphere, barometer, wind, rainfall, temperature, climate, climatic zones, rivers, glaciers, plains and plateau, mountains, volcanoes, deserts, oodnadatta, campel transport, lakes, lake frome, shorelines, oceans, tides, latitude and longtitude

An hourglass or sandglass is an instrument for measuring a defined time and can be used perpetually by simply turning it over immediately the top bulb empties. The clear blown glass is shaped into two equal sized bulbs with a narrow passage in the centre and contains uniform sized sand or glass particles in the lower bulb. The width of the neck regulates the constant flow of the particles. The glass is held in a stand with top and bottom of equal shape and size. Hourglasses can measure an infinite variety of time by gauging the size of the particles, the shape and size of the bulbs and the size of the passage between the bulbs, thus measuring hours or minutes or even seconds. Generally an hourglass sits between discs of wood at the ends, which are joined by long wooden spindles between the ends and tightened by screw caps. The length of time can be adjusted by adding or removing sand particles. The use of the marine sandglass (or hourglass) has been recorded in the 14th century in European shipping. A one minute sandglass was used in conjunction with the ship’s log for ‘dead reckoning’, (see below) that is, for measuring the ship’s speed through the water. They were also used to regulate ringing the ship’s timetable; for example a 4 hour sandglass was used for the length of the sailors’ watch, and a half hour timer for taking of readings for the ship’s log; the ship’s bell would be rung every half hour. It was usually the role of the cabin boy to watch and turn the sandglasses over at the exact time of them emptying their upper chambers and to ring the ship’s bell. Hourglasses have been used historically for many hundreds of years. Some have been used for timing church sermons, in cooking, in industry and at sea. Even today they are used for measuring the cooking time of eggs and timing a player’s turn in games such as Boggle and Pictionary. The sandglasses at sea were gradually replaced in the late 1700’s to early 1800’s by the more accurate chronometers (marine clocks) when they became reliable instruments. DEAD RECKONING (or Deduced Reckoning) Dead reckoning is the term used to describe the method of calculating the ship’s position from its speed and direction, used in early maritime travel, mostly in European waters. Both the (1) speed and the (2) direction of travel were recorded on a Traverse Board at half-hourly intervals during a helmsman’s watch of 4 hours. The navigator would record the readings in his ship’s log, plot them on his navigational chart and give his updated course directions to the next helmsman on watch, along with the cleared Traverse Board. This was a very approximate, but none-the-less helpful, method of navigation. The wooden Traverse Board was a simple pegboard with a diagram of a compass with eight peg holes along the radius to each of the compass points, plus a grid with ascending half hours in the left column and increasing ship’s speed in knots in a row across the column headings, with a peg hole in each of the intersecting cells. A number of wooden pegs were attached to strings on the board. By placing one peg consecutively in the direction’s radius hole, starting from the centre, and the speed holes when the half hourly reading was taken, a picture of speed and direction for the whole 4 hour watch was created. (1) To measure the ship’s speed a one minute hourglass timer was usually used to measure the ship’s speed through the water and help to calculate its longitude. A rope, with knots at regular standard intervals and a weight such as a log at the end, would be thrown overboard at the stern of the ship. At the same time the hourglass would be turned over and a seaman would start counting the number of knots on the rope that passed freely through his hands as the ship travelled. When the timer ran out the counting would be stopped. A timer of one minute (one-sixtieth of an hour), knots spaced one-sixtieth of a nautical mile apart, and simple arithmetic easily gave the speed of the ship in nautical miles per hour ("knots"). This would be recorded every half hour. The speed could however be inaccurate to the travel being affected by ocean currents and wind. (2) To calculate the ship’s direction a compass sighting would be recorded each half hour.Marine hourglasses or sandglasses were used from around the 14th to 19th century during the time of sailing ships. This hourglass is representative of that era, which is during the time of the colonisation of Australia. Hourglass or sandglass; an instrument used to measure time. Two equal sized clear glass bulbs joined with a narrow passage between them, containing equal sized particles of sand grains in lower bulb. Glass sits in a brass collar at each end, in a frame comprising 3 decorative brass columns or posts, each attached top and bottom, using round screw-on feet, to round brass discs. Disc have Roman numerals for the numbers 1 - 12 pressed into their inner surfaces and hieroglyphics on the outer surfaces. Roman numerals on inner surface of discs " I II III IV V VI VII VIII IX X XI XII " Hieroglyphics impressed on outer surface of discsflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, horology, hourglass, hour glass, sandglass, sand glass, timing instrument, dead reckoning, deduced reckoning, finding latitude at sea, sandglass with hieroglyphics and roman numerals, hourglass with hieroglyphics and roman numerals, brass hourglass