Letter from H. C. Turner, Secretary of Scalebuoys Limited asking if the Bendigo Electronic Co. would send Mr. Barrett particulars of Scalebuoys. Letter dated August 29, 1938. Letter typed on paper with printed letterhead.sciences, instruments - general, bill ashman collection - correspondence, scalebuoys limited, the bendigo electronic co

Seven letters dated between 1/10/1940 and 20/12/40 from F. Gifford of Gifford's Hotel, Mount Gambier, S.A. and Stevenson Bros. and The Bendigo Electronic Co. in reference to installing Scalebuoys in the hot water service at Gifford's Hotel. First letter from F. Gifford has printed letterhead with name, address and facilities in dark blue printing.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, gifford's hotel, stevenson bros, bendigo electronic co, f gifford, d dept

Letter from McPherson's Limited to Messrs Bendigo Electronic Co. of Australia, dated 15 November,1950. Letter is from John Byrt, Asst. Chemist for Attention Mr. Stevenson. Cover letter states they have enclosed copies of Report No. 17355 covering 'Dezincification of Brass Wire in 'Scalebuoy' Water'. Two pieces of wire were analized. In the discussion the brittleness had resulted from dezincification,which was known to be a common type of corrosion of that material. It was recommended that different wire be used. Four alloys were recommended: Cupro-nickel, Aluminium brass, Arsenical brass and Admiralty brass. Two copies of the report.sciences, instruments - general, scalebuoy, bill ashman collection, mcpherson's limited, messrs bendigo electronic co of australia, mr stevenson, j byrt

What device converts AC to DC? rectifier A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification, since it "straightens" the direction of current. The unit was used at Ballarat School of Mines in the Maths, Science and Physics Departments.Grey metal unit with Dials on the front and vents at the back. Handle for carrying. Two switches for turning on and off. Yellow sticker - SMB - with number 116071. Engraved on back - S.M.B.. Maths / Science / Physics Sticker on cord indicating inspection of unit - 13/04/2005. Tag Number - 032735alternating current, direct current, ac, dc, rectifier, electrical, ballarat school of mines, science, maths, physics

Black leather look binder containing information, letters, diagrams, plans, drawings, graphs, telegrams & photographs all relating to Scalebuoys.sciences, instruments - general, scalebuoy, bendigo-inventions-scalebuoys-bendigo electronic co-abbott

Dull orange folder containing copies of letters, brochures, information sheets and some newspaper cuttings. Name on the front is Frank A. Stevenson 244 Hargreaves St Bendigo. Letters date from 1937 to 1942. Newspaper titles include: Prevention of Rust- Principle of the Scalebuoy, Scalebuoys in Cars, Tragic Death of Captain Hartley Abbott and the Obituary of Captain R.H.S.Abbott.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, frank a stevenson, mr bacon, amalgamated freezing co bendigo, g whalley, gunbower co-operative butter factory & trading coy ltd, mr wallace, j charlesworth, d v evershed, bendigo electronic co, walshes crown hotel, hunter bros, wybgones unit, 180 gold mining co, o'hallorans cyanide unit, crystal ice works, stevenson unit, bendigo council, central nell gwynne, nth deborugh g m co, deborugh g m c, deborugh consolidated, cohuna butter factory, geo ross, victorian producers' co-operative coy ltd, h abbott, ernest f o liddell, rothacker bros, motor spares ltd, leggo's buildings, t j jorgensen, mr robinson, stevenson bros, r h s abbott, d c house, the electrical factor in metabolism, w n abbott, the great boulder proprietary gold mines ltd, w o galletly, mr stronell, newport workshops, victorian railways, mr brownbill, mr james, the university of melbourne, j l osborne, n clarkson, sister mary gonzaga, st joseph's hospital, mater misericordiae hospital, mr herzog, sister m monica?, vacuum oil, j johns, h j grigg, w a walsh, market square, crown hotel, g e cole, transport & engineering in australia 16/12/1937, mr menderson, mr ross, sanitary age 8/2/1935, northern kiwanis clubs, harry a baxter, w h cunningham & hill ltd, link-belt co ltd, sir william crooks, royal zoological society, ginna works germany, close brothers, w h taylor, geo taylor hardware co ltd, details of hydraulic spinner unit (scalebuoy), a davidson, john g kelly inc, hannon, myers wishart, kennedy, mr critten, pennsylvania rubber coy, paul a douden & co, w e humphrey, kansas city public service co, smith, tangney hotels, wahkonsa hotel, muscatine hotel, arlington hotel, burke hotel, helen tangney-springer, f w woolworth co, w w edan, ymca, n f alcock, b j ingram, scalebuoys, bendigo electronic company of australia proprietary limited, a s bloomfield, harry ponsonby mackenzie, arthur robinson & co, the commercial banking company of sydney ltd, a t madden, victorian railways, e c eyers, city of bendigo, frank h day, lane's motors pty ltd, h c holland, union oil soap & candle co ltd, knox home, n a duthie, w h mccorkindale, maungatapere co-op dairy co ltd, the whangarei co-op dairy co ltd, w h millingford, kettering cartons limited, j g arlidge, w e humphrey, kansas city public service company, h w smith, prospectus of scale buoy distributors limited, edwin gripper banks, richard hartley smith abbott, frank shaw fitchett, hayden smith & fitchett, the commercial bank of australia limited, william john stanley horsfall, frank cooper, scott's hotel, a j phillips, stringer & phillips proprietary ltd, e g banks, edwin gripper banks, reginald william stringer, frank cooper, claude gordon robinson, s reid

Light tan envelope addressed to Messrs Bendigo Electronics Co. of Australia, 31 View Street, Bendigo. Attention Mr. Stevenson. McPherson's Ltd. Box 4500 Melbourne, Victoria printed in the bottom left corner. Envelope contained 2 negatives, 3 photos (2 the same) and a piece of paper with a typed 'Modern Physical Laboritory Practice by John Spring, Ph. D.'scalebuoy, bill ashman collection - correspondence, mr stevenson, bendigo electronic co of australia, mcpherson's ltd

Typed letter, dated 8/4/49, with an Application Form for Hiring Radio-electric Medical Units attached. Letter is from Norman to Harold. Letter refers to the administrative side of Scalebuoys and a new business venture. Also some shares for Hartley's widow and that she can't sell or will them to anyone. Development in Great Britain is also mentioned.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, dr w n abbott, dr may, electronic co, mr a k duthie, hartley, stephenson, mackenzie, dr d h abbott, mr holt, electronic company of nz, wallace, bruce, duthie, voyce, stevenson, mccorkindale, medical research council, radio-electric research unit, stoke-mandeville hospital, capillograph, pasteur, mandevilles

The unit was used at Ballarat School of Mines in the Maths, Science and Physics Departments.Grey metal unit with Dials on the front and vents at the back. Handles for carrying. Two circuit breaker switches, two DC output sockets, two AC output socketsYellow sticker - SMB - with number 116069. Engraved on back - S.M.B.. Maths / Science / Physics Sticker on cord indicating inspection of unit - 13/04/2005. Tag Number - 032725alternating current, direct current, ac, dc, electrical, ballarat school of mines, science, maths, physics, ac/dc, scientific instrument

1958 C.R.B. Plan of Survey of Part of Crown Portion 12 Section 4 Parish of Nillumbik, County of Evelyn Eltham-Yarra Glen Road, Shire of Eltham Shows Surveyor field notes, property ownership and building type and construction.1958, eltham-yarra glen road, a.f. munday, bible street, brougham steet, country roads board, dalton street, eltham, j.p. & e.a. sanders, j.w. & e. m. graham, l.c. skipper, l.m. jarrold, main road, napoleon street, survey plan, neil webster collection, franco and co

McColl Rankin & Stanistreet solicitors electronic ledger entries for various Bendigo Gold Mining Companies 6994.1 Wages sheet - Nell Gwynne Reef Mine; manila folder containing one sheet of paper with wages entry for week ending 9th December 1979 6994.2 Ledger of names in alphabetical order, undated !!! 6994.3 Bound ledger, noted as Central Comet G. M. Co (Gold Mining Company), No Liability. handwritten entries by many hands. dated 11 March 1898 to 4 December 1899. reporting on payments not authorised by the Directors. Entries over five double pages majority of the ledger is unused. 6994.4 Deborah Gold Mines, No Liability, electronic ledger sheets dated from 1945 to 1950, for supplies, etc. 6994.5 Forfeited Share Sales. Exercise book with unreadable cover notation, listing sales of forfeited shares in various companies managed by McM R & S. 6994.6 South Deborah Gold Mines, No Liability. Paper pages containing ledger entries. Dated 1940s. 6994.7 East Clarence Gold Mining Company, No Liability. Paper pages of electronic ledger cards. Dated 1940s for wide range of company expenditures. 6994.8 Forbes Carshalton G. M. Co. No Liability paper pages with ledger entries. Dated 1940s. 6994.9 South Nell Gwynne G. M. Co. No Liability paper pages with ledger entries. Dated 1940s. 6994.10 Napoleon Reef G. M. Co. No Liability paper pages with ledger entries. Dated 1940s. 6994.11 Deborah United G. M. Co. No Liability paper pages with ledger entries. Dated 1940s. 6994.12 Central Napoleon G. M. Co. No Liability; paper pages with ledger entries. Dated 1940s. 6994.13 Golden Carshalton G. M. Co. No Liability; paper pages with ledger entries. Dated 1940s. 6994.14 North Virginia G. M. Co. No Liability; paper pages with ledger entries. Dated 1940s. 6994.15 New Monument G. M. Co. No Liability; paper pages with ledger entries. Dated 1940s. 6994.16 South Nell Gwynne G. M. Co. No Liability; paper pages with ledger entries. Dated 1940s. 6994.17 New Don G. M. Co. No Liability; paper pages with ledger entries. Dated 1940s. 6994.18 Red White & Blue Extended G. M. Co. No Liability paper pages with ledger entries. Dated 1940s. Company stamp at the top of the electronic ledger pagessocial history, mining company records, mining companies

Letter, typed on paper with printed letterhead of Scalebuoys Limited. Astor House, Aldwych, London, W.C.2. Letter mentions the enclosure of a list of Foreign Agents. Also mentioned is the use of Scalebuoy water for the canning industry.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, scalebuoys limited, h c turner, scalebuoy company boston, w h cunningham & hill ltd, bendigo electronic company, scalebuoys (n.z.) limited, herr otto wulfrath, societe des chaudieres electriques francaises, don watson & co ltd, major t d hackett, commandante v betteloni, w h holt white, findlay durham & brodie, zuberbuhler & co, g kolovitch, g m b close, g p barker, l f norris

Cream booklet with brown printing titled Bendigo Electronic Company of Australia Proprietary Limited. Includes Capital, number of Shares, Directors, Solicitors, Bankers Registered Office, Copy of a letter re Patents, Information about Scalebuoys, Users of Scalebuoys, What Scalebuoys Do and Where they are used, Also copies of letters from the Victorian Railways, City Overseer Bendigo, Lane's Motors Pty Ltd Melbourne, Union Oil, Soap & Candle Co. Ltd NZ, Knox Home NZ, Maungatapere Co-Op Dairy Co. Ltd., Whangarei Co-operative Dairy Company Ltd. NZ, Kettering Cartons Limited England, Pennsylvania Rubber Company USA, and the Kansas City Public Service Company USAsciences, instruments - general, scalebuoy, bill ashman collection - correspondence, bendigo electronic company of australia pty ltd, a s bloomfield, r h s abbott jnr, harry ponsonby mackenzie rn (retd), arthur robinson & co, the commercial banking company of sydney limited melbourne, a t madden, h a abbott, e c eyers, frank stevenson, city of bendigo, frank h day, lane's motors pty ltd, h c holland, national mutual chambers (n.z.) ltd, union oil soap & candle co ltd, knox home, n a duthie, w h mccorkindale, maungatapere co-op dairy co ltd, j stevenson, the whangarei co-op dairy company ltd, w h millingford, kettering cartons limited, j g arlidge, pennsylvania rubber company, paul a douden & company, w e humphrey, kansas city public service company, h w smith, j t picken & sons

Black and white photo of two men outside a building with two piles of scale and a Scalebuoy Unit. One man standing beside the door is wearing a suit and the other man, sitting on a box, is wearing overalls and he is holding a six buoy unit. One pile of scale is pale and the other is black. Written in the photo is Shrensbury Dairy Co (N.J). Beside the black pile of scale is: Scale removed July 12-1933 and beside the pale heap is: Scale removed May 10-1933. At the bottom is: Electronic Buoys Installed Feb. 26-1933. Photo is pasted on an album page. On the back is another sepia photo of a very large scalebuoy unit which is resting on the ground. Behind it a large tank resting on two large concrete blocks.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, shrensbury dairy co (n.j)

Letter, dated February 24, 1948, from Robert Pagel of the Midwest Extraction Co. to Mr. Frank A. Stevenson of the Bendigo Electronic Company. He asks if literature advertising and explanation of Scalebuoys could be sent to Mr. H. Nathan of 1918 Douglas Street, Rockford, Illinois as he is very interested in them.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, midwest extraction co, bendigo electronic company, frank a stevenson, h nathan, robert pagel

This light bulb or globe was used for lighting the torch of an electronic tongue depressor. It was donated to Flagstaff Hill Maritime Village by the family of Doctor William Roy Angus, Surgeon and Oculist. It is part of the “W.R. Angus Collection” that includes historical medical equipment, surgical instruments and material once belonging to Dr Edward Ryan and Dr Thomas Francis Ryan, (both of Nhill, Victoria) as well as Dr Angus’ own belongings. The Collection’s history spans the medical practices of the two Doctors Ryan, from 1885-1926 plus that of Dr Angus, up until 1969. ABOUT THE “W.R.ANGUS COLLECTION” Doctor William Roy Angus M.B., B.S., Adel., 1923, F.R.C.S. Edin.,1928 (also known as Dr Roy Angus) was born in Murrumbeena, Victoria in 1901 and lived until 1970. He qualified as a doctor in 1923 at University of Adelaide, was Resident Medical Officer at the Royal Adelaide Hospital in 1924 and for a period was house surgeon to Sir (then Mr.) Henry Simpson Newland. Dr Angus was briefly an Assistant to Dr Riddell of Kapunda, then commenced private practice at Curramulka, Yorke Peninsula, SA, where he was physician, surgeon and chemist. In 1926, he was appointed as new Medical Assistant to Dr Thomas Francis Ryan (T.F. Ryan, or Tom), in Nhill, Victoria, where his experiences included radiology and pharmacy. In 1927 he was Acting House Surgeon in Dr Tom Ryan’s absence. Dr Angus had become engaged to Gladys Forsyth and they decided he would take time to further his studies overseas in the UK in 1927. He studied at London University College Hospital and at Edinburgh Royal Infirmary and in 1928, was awarded FRCS (Fellow from the Royal College of Surgeons), Edinburgh. He worked his passage back to Australia as a Ship’s Surgeon on the on the Australian Commonwealth Line’s T.S.S. Largs Bay. Dr Angus married Gladys in 1929, in Ballarat. (They went on to have one son (Graham 1932, born in SA) and two daughters (Helen (died 12/07/1996) and Berenice (Berry), both born at Mira, Nhill ) Dr Angus was a ‘flying doctor’ for the A.I.M. (Australian Inland Ministry) Aerial Medical Service in 1928 . The organisation began in South Australia through the Presbyterian Church in that year, with its first station being in the remote town of Oodnadatta, where Dr Angus was stationed. He was locum tenens there on North-South Railway at 21 Mile Camp. He took up this ‘flying doctor’ position in response to a call from Dr John Flynn; the organisation was later known as the Flying Doctor Service, then the Royal Flying Doctor Service. A lot of his work during this time involved dental surgery also. Between 1928-1932 he was surgeon at the Curramulka Hospital, Yorke Peninsula, South Australia. In 1933 Dr Angus returned to Nhill where he’d previously worked as Medical Assistant and purchased a share of the Nelson Street practice and Mira hospital from Dr Les Middleton one of the Middleton Brothers, the current owners of what was once Dr Tom Ryan’s practice. Dr L Middleton was House Surgeon to the Nhill Hospital 1926-1933, when he resigned. [Dr Tom Ryan’s practice had originally belonged to his older brother Dr Edward Ryan, who came to Nhill in 1885. Dr Edward saw patients at his rooms, firstly in Victoria Street and in 1886 in Nelson Street, until 1901. The Nelson Street practice also had a 2 bed ward, called Mira Private Hospital ). Dr Edward Ryan was House Surgeon at the Nhill Hospital 1884-1902 . He also had occasions where he successfully performed veterinary surgery for the local farmers too. Dr Tom Ryan then purchased the practice from his brother in 1901. Both Dr Edward and Dr Tom Ryan work as surgeons included eye surgery. Dr Tom Ryan performed many of his operations in the Mira private hospital on his premises. He too was House Surgeon at the Nhill Hospital 1902-1926. Dr Tom Ryan had one of the only two pieces of radiology equipment in Victoria during his practicing years – The Royal Melbourne Hospital had the other one. Over the years Dr Tom Ryan gradually set up what was effectively a training school for country general-practitioner-surgeons. Each patient was carefully examined, including using the X-ray machine, and any surgery was discussed and planned with Dr Ryan’s assistants several days in advance. Dr Angus gained experience in using the X-ray machine there during his time as assistant to Dr Ryan. Dr Tom Ryan moved from Nhill in 1926. He became a Fellow of the Royal Australasian College of Surgeons in 1927, soon after its formation, a rare accolade for a doctor outside any of the major cities. He remained a bachelor and died suddenly on 7th Dec 1955, aged 91, at his home in Ararat. Scholarships and prizes are still awarded to medical students in the honour of Dr T.F. Ryan and his father, Dr Michael Ryan, and brother, John Patrick Ryan. ] When Dr Angus bought into the Nelson Street premises in Nhill he was also appointed as the Nhill Hospital’s Honorary House Surgeon 1933-1938. His practitioner’s plate from his Nhill surgery states “HOURS Daily, except Tuesdays, Fridays and Saturday afternoons, 9-10am, 2-4pm, 7-8pm. Sundays by appointment”. This plate is now mounted on the doorway to the Port Medical Office at Flagstaff Hill Maritime Village, Warrnambool. Dr Edward Ryan and Dr Tom Ryan had an extensive collection of historical medical equipment and materials spanning 1884-1926 and when Dr Angus took up practice in their old premises he obtained this collection, a large part of which is now on display at the Port Medical Office at Flagstaff Hill Maritime Village in Warrnambool. During his time in Nhill Dr Angus was involved in the merging of the Mira Hospital and Nhill Public Hospital into one public hospital and the property titles passed on to Nhill Hospital in 1939. In 1939 Dr Angus and his family moved to Warrnambool where he purchased “Birchwood,” the 1852 home and medical practice of Dr John Hunter Henderson, at 214 Koroit Street. (This property was sold in1965 to the State Government and is now the site of the Warrnambool Police Station. ). The Angus family was able to afford gardeners, cooks and maids; their home was a popular place for visiting dignitaries to stay whilst visiting Warrnambool. Dr Angus had his own silk worm farm at home in a Mulberry tree. His young daughter used his centrifuge for spinning the silk. Dr Angus was appointed on a part-time basis as Port Medical Officer (Health Officer) in Warrnambool and held this position until the 1940’s when the government no longer required the service of a Port Medical Officer in Warrnambool; he was thus Warrnambool’s last serving Port Medical Officer. (The duties of a Port Medical Officer were outlined by the Colonial Secretary on 21st June, 1839 under the terms of the Quarantine Act. Masters of immigrant ships arriving in port reported incidents of diseases, illness and death and the Port Medical Officer made a decision on whether the ship required Quarantine and for how long, in this way preventing contagious illness from spreading from new immigrants to the residents already in the colony.) Dr Angus was a member of the Australian Medical Association, for 35 years and surgeon at the Warrnambool Base Hospital 1939-1942, He served as a Surgeon Captain during WWII 1941-45, in Ballarat, Victoria, and in Bonegilla, N.S.W., completing his service just before the end of the war due to suffering from a heart attack. During his convalescence he carved an intricate and ‘most artistic’ chess set from the material that dentures were made from. He then studied ophthalmology at the Royal Melbourne Eye and Ear Hospital and created cosmetically superior artificial eyes by pioneering using the intrascleral cartilage. Angus received accolades from the Ophthalmological Society of Australasia for this work. He returned to Warrnambool to commence practice as an ophthalmologist, pioneering in artificial eye improvements. He was Honorary Consultant Ophthalmologist to Warrnambool Base Hospital for 31 years. He made monthly visits to Portland as a visiting surgeon, to perform eye surgery. He represented the Victorian South-West subdivision of the Australian Medical Association as its secretary between 1949 and 1956 and as chairman from 1956 to 1958. In 1968 Dr Angus was elected member of Spain’s Barraquer Institute of Barcelona after his research work in Intrasclearal cartilage grafting, becoming one of the few Australian ophthalmologists to receive this honour, and in the following year presented his final paper on Living Intrasclearal Cartilage Implants at the Inaugural Meeting of the Australian College of Ophthalmologists in Melbourne In his personal life Dr Angus was a Presbyterian and treated Sunday as a Sabbath, a day of rest. He would visit 3 or 4 country patients on a Sunday, taking his children along ‘for the ride’ and to visit with him. Sunday evenings he would play the pianola and sing Scottish songs to his family. One of Dr Angus’ patients was Margaret MacKenzie, author of a book on local shipwrecks that she’d seen as an eye witness from the late 1880’s in Peterborough, Victoria. In the early 1950’s Dr Angus, painted a picture of a shipwreck for the cover jacket of Margaret’s book, Shipwrecks and More Shipwrecks. She was blind in later life and her daughter wrote the actual book for her. Dr Angus and his wife Gladys were very involved in Warrnambool’s society with a strong interest in civic affairs. Their interests included organisations such as Red Cross, Rostrum, Warrnambool and District Historical Society (founding members), Wine and Food Society, Steering Committee for Tertiary Education in Warrnambool, Local National Trust, Good Neighbour Council, Housing Commission Advisory Board, United Services Institute, Legion of Ex-Servicemen, Olympic Pool Committee, Food for Britain Organisation, Warrnambool Hospital, Anti-Cancer Council, Boys’ Club, Charitable Council, National Fitness Council and Air Raid Precautions Group. He was also a member of the Steam Preservation Society and derived much pleasure from a steam traction engine on his farm. He had an interest in people and the community He and his wife Gladys were both involved in the creation of Flagstaff Hill, including the layout of the gardens. After his death (28th March 1970) his family requested his practitioner’s plate, medical instruments and some personal belongings be displayed in the Port Medical Office surgery at Flagstaff Hill Maritime Village, and be called the “W. R. Angus Collection”. The W.R. Angus Collection is significant for still being located at the site it is connected with, Doctor Angus being the last Port Medical Officer in Warrnambool. The collection of medical instruments and other equipment is culturally significant, being an historical example of medicine from late 19th to mid-20th century. Dr Angus assisted Dr Tom Ryan, a pioneer in the use of X-rays and in ocular surgery. Lens bulb, NEICO #24B -2.5v, for an electronic tongue depressor in original cardboard package; part of the W.R. Angus Collection. The package is rectangular and the base slides out, giving access to the small globe. Package reads "Genuine NEICO #24B -2.5v lens bulb for National Model N24 tongue depressor. Operates from battery handle or Transformer. Long life. Brilliant", "Made in U.S.A.. Tested and sealed at factory", "National Elec. Instr. Co. Inc. Long Island, New York". "Apply current gradually until filament is changing from yellow to a white light - THEN STOP. Glaring Illumination indicates excessive voltage which shortens filament light without increasing illuminating efficiency."flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, dr w r angus, dr ryan, surgical instrument, t.s.s. largs bay, warrnambool base hospital, nhill base hospital, mira hospital, flying doctor, medical treatment, medical history, national electric instrument company, electronic tongue depressor, lens bulb

This pH meter was made in 1946 by Cambridge Scientific Instrument Co. Ltd. in London. The company was founded in 1881 and the owner eventually became Horace Darwin, the youngest son of the famous scientist Charles Darwin. It is a portable version that can be used on-site in many different situations. A similar instrument was used by the Chemistry Department of what is now the University of Cambridge. The science of pH measurement began in the 1910s and was further developed in 1926. The pH meter is an electronic scientific instrument used to determine the pH measurements of a solution accurately; the amount of acid and alkaline in it This measurement can have many other applications helping to maintain the appropriate balance for a particular result. For example, it can measure the pH of pharmaceutical medications, soil, swimming pool water and hair shampoos. This Cambridge portable electronic pH instrument was made in 1946 by a company specialising in scientific instruments. It is an early example of much smaller devices used today in many different fields including medicine, and the preservation and conservation of shipwreck artefacts. Flagstaff Hill Maritime Museum and Village's Curator uses a pH meter today in the conservation process of a historic cannon that was recovered from the 1839 wreck of the vessel 'Children'.Scientific instrument, electric Cambridge Portable pH Meter in a polished wooden box with compartments, fold-out doors, and leather carry handle. Includes blue covered Instruction manual with a 'Certificate of Test' inside, and chemicals. Electrodes mounted in compartment. The lid is separate from the base, attached by pins and hinges. A plate inside the lid gives instructions for 'Preparation for Use'. Made by the Cambridge Instrument Company, London, in 1946.Printed on plate: "Cambridge Instrument Co. Ltd, 13 Grosvenor Place, London, S.W.1' Certificate dated: "6-3- 46" (1946)flagstaff hill, warrnambool, maritime museum, maritime village, great ocean road, shipwreck coast, ph meter, cambridge scientific instrument co. ltd, horace darwin, cambridge university, ph balance, scientific instrument, ph measurement

Mullard Limited was a British manufacturer of electronic components. The Mullard Radio Valve Co. Ltd. of Southfields, London, was founded in 1920 by Captain Stanley R. Mullard, who had previously designed valves for the Admiralty before becoming managing director of the Z Electric Lamp Co. The company soon moved to Hammersmith, London and then in 1923 to Balham, London. The head office in later years was Mullard House in Torrington Place, Bloomsbury, now part of University College London. In 1923, in order to meet the technical demands of the newly formed BBC, Mullard formed a partnership with the Dutch manufacturer Philips. The valves (US vacuum tube) produced in this period were named with the prefix PM, for Philips-Mullard, beginning with the PM3 and PM4 in 1926. Mullard finally sold all its shares to Philips in 1927. In 1928 the company introduced the first pentode valve to the British market. Mullard opened a new manufacturing plant at Mitcham, Surrey in 1929 and in late 1930s Mullard opened a new plant in Blackburn, Lancashire. By 1949 Mullard had produced a number of television sets, such as the MTS-521 and MTS-684 and in 1951 Mullard was producing the LSD series of photographic flash tubes. In the early 1980s, Mullard manufactured the SAA5050, some of the earliest teletext decoding modules made in the UK. In 1957 Philips-Mullard helped to set up the Mullard Radio Astronomy Observatory (MRAO) at the University of Cambridge. Philips continued to use the brand name "Mullard" in the UK until 1988. Mullard Research Laboratories in Redhill, Surrey then became Philips Research Laboratories. As of 2007, the Mullard brand has been revived by Sovtek, producing a variant of the ECC83 and EL34. The Z Electric Lamp Co. continued business into the 1970s operating from premises in Thornton Heath, south London, manufacturing lamps of specialised design but it closed due to the recession in the mid 1970s. Sovtek is a brand of vacuum tube owned by Mike Matthews's New Sensor Corporation and manufactured in Saratov, Russia. They are often used in guitar amplificationA box with a 'Mullard' valve for a radioTop of box : MULLARD / ELECTRONIC VALVE / Side of box; GAURANTEED ELECTRONIC / VALVE / MULLARD ( in a shield) : mullard radio valve co. ltd., london, mullard captain stanley, electronic equipment, moorabbin, bentleigh, cheltenham, early settlers

A Large Rare mid 19th Century Balance Scale (also called a Beam Scale) Made in England by W&T Avery a British manufacturer of weighing machines. The company was founded in the early 18th century and took the name W & T Avery in 1818. The undocumented origin of the company goes back to 1730 when James Ford established the business in the town of Digbeth. On Joseph Balden the then company’s owner’s death in 1813 William and Thomas Avery took over his scale making business and in 1818 renamed it W & T Avery. The business rapidly expanded and in 1885 they owned three factories: the Atlas Works in West Bromwich, the Mill Lane Works in Birmingham and the Moat Lane Works in Digbeth. In 1891 the business became a limited company with a board of directors and in 1894 the shares were quoted on the London Stock Exchange. In 1895 the company bought the legendary Soho Foundry in Smethwick, a former steam engine factory owned by James Watt & Co. In 1897 the move was complete and the steam engine business was gradually converted to pure manufacture of weighing machines. The turn of the century was marked by managing director William Hipkins who was determined to broadening the renown of the Avery brand and transforming the business into a specialist manufacture of weighing machines. By 1914 the company occupied an area of 32,000m² and had some 3000 employees. In the inter-war period the growth continued with the addition of specialized shops for cast parts, enamel paints and weighbridge assembly and the product range diversified into counting machines, testing machines, automatic packing machines and petrol pumps. During the second world war the company also produced various types of heavy guns. At that time the site underwent severe damage from parachute mines and incendiary bombs.Then from 1931 to 1973 the company occupied the 18th-century Middlesex Sessions House in Clerkenwell as its headquarters. Changes in weighing machine technology after World War II led to the closure of the foundry, the introduction of electronic weighing with the simultaneous gradual disappearance of purely mechanical devices. The continued expansion was partly achieved through a series of acquisitions of other companies. After almost a century of national and international expansion the company was taken over by GEC in 1979. Keith Hodgkinson, managing director at the time, completed the turn-around from mechanical to electronic weighing with a complete overhaul of the product range of retail scales and industrial platform scales. In 1993 GEC took over the Dutch-based company Berkel and the Avery-Berkel name was introduced. In 2000 the business was in turn acquired by the US-American company Weigh-Tronix, who already owned Salter, and is today operating as Avery Weigh-Tronix. Item made and used possibly around the 1850s by Victorian colonial government to check weights of goods being sold by early shop keepers on the gold fields item is very rare.James McEwan & Co were the retailers of W & T Avery scales in Victoria from 1852. A very rare item used probably to check weights used by merchants during colonial times by government inspectors in Victoria. A similar example exist in a NSW museum, the item is believed to have been made before W & T Avery expansion to the Soho foundry in Birmingham in 1885 and after 1818.Beam balance scale suspended from a wooden tripod, with metal trays suspended by three chain lengths. embossed on the balance beam W T Avery, Birmingham,flagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, scale, avery

Yields information about Ballarat No. 30, in the 1950's - SEC Official photograph.1708 - Black and white photograph of a Ballarat Sebastopol type tramcar when built new in 1913. Photo used in Keith Kings book, "The Ballarat Tramways" on page 28. Understood to be an ESCo photograph. Tram has "Suttons for Gramophones" roof advertisement, words "Ballarat Tramways" on the top rail above windows and "Coliseum Photoplays"in central window. Two of the four side blinds are in the down position, probably done to show their presence. Tram has a "bulls-eye" type destination indicator. Photographed outside the depot with Lake Wendouree in the background. Photograph is a photo of another print, with the words? "Original Rolling Stock" underneath the original print and the black ink "12" in the bottom left hand corner on the newer print. 1708.1 - as above, but without the "12" written on the photograph. The words "Ballarat Rolling Stock 2 Man Brush Type Car 1918". - added 18/11/2001. 1708.2 - as above, but with more of the label cut off. 1708.3 - Electronic copy of same photograph donated by Ron Hann on a CD of photographs given to him at the time of his visit in January 1963 by the Manager. Refer to email held with item 3841. Added 28/2/2010. See Reg Item 4568 for the CD. See page 28 of Keith Kings, The Ballarat Tramways. 1708.1 - "12" in pencil in top right hand corner.trams, tramways, sebastopol type, suttons, coliseum, destination indicators, esco

The core memory of this calculator was a #D metal box. The pin must have been attached to a card reader or keyboard to enter the programme. According to Sharp’s serial numbering scheme, which encodes the month and year of manufacture of their electronic calculators at least through the mid-1970’s, this calculator was manufactured in September 1969. The technology used in the Memorizer 30/Memorizer 60 was very typical of that of the late 1960s, with small-scale integrated circuits containing a few gates or flip-flops, and a magnetic core memory array for storing the program steps that the user keyed in using the calculator attached to the device. (with thanks to Rick Bensene, Curator of the Old Calculator Museum, Beavercreek, Oregon, USA) ISharp Memorizer 60 (Model CSA-12). The Model CSA-12, called the "Memorizer 60", was an accessory that could be connected to a Sharp Compet 22 or Compet 32 electronic calculator to allow these machines to be "learn mode" programmed. Programs were "learned" from the keyboard of the calculator, and stored within a core memory array in the Memorizer 60. Programs of up to 60 steps could be stored. The Memorizer 60 could them "play back" the stored steps at high speed, to allow relatively complex math operations to be performed. (http://www.oldcalculatormuseum.com/m-sharpcsa12.html)Serial No. 910 106 09Bcalculator, memorizer 60, computers, programmable calculator, electronic calculators

Used in the Ballarat Institute of Advanced Education, Physics Department as a stand-alone unit or it could be connected to the Sharp Memorizer - 60 if one was available.Desk-top electric calculator with 16 digit electronic display; 2 memories;operations controlled by keyboard. Type: Sharp Compet 32, Model C5 - 32C Serial No. 912908With dymo tape labels: "1st YR"; "PHYSICS"; "PURCHASED 6/11/69" Gold sticker: "Edwards Sales and Service 42 3951"electric calculator, ballarat institute of advanced education, physics department

A cream coloured manual with black writing on the cover. There is written in blue ink 18615 2Lt L.B. Dawsonelectronic manuals, communications, military radios

The Fuller cylindrical slide rule, is a cylindrical slide rule with a helical main scale taking 50 turns around the cylinder. This creates an instrument of considerable precision – it is equivalent to a traditional slide rule 25.40 metres (1,000 inches) long. It was invented in 1878 by George Fuller, professor of engineering at Queen's University Belfast, and despite its size and price it remained on the market for nearly a century because it outperformed nearly all other slide rules. He patented it in Britain in 1878, described it in a journal in 1879 and in that year he also patented it the United States, depositing a patent model. As with other slide rules, the Fuller is limited to calculations based on multiplication and division with additional scales allowing for trigonometrical and exponential functions. The mechanical calculators produced in the same era were generally restricted to addition and subtraction with only advanced versions, like the Arithmometer, able to multiply and divide. Even these advanced machines could not perform trigonometry or exponentiation and they were bigger, heavier and much more expensive than the Fuller. In the mid-twentieth century the handheld Curta mechanical calculator became available which also competed in convenience and price. However, for scientific calculations the Fuller remained viable until 1973 when it was made obsolete by the HP-35 handheld scientific electronic calculator. Fuller's calculators were manufactured by the scientific instrument maker W.F. Stanley & Co. of London who made nearly 14,000 between 1878 and 1973.Like all slide rules, logarithmic scales are used to facilitate calculations more quickly and efficiently. The spiral logarithmic scale greatly increases the precision and computing power of the slide rule. In addition, its tables provide useful information to its users, most likely engineers. Its remarkable length permitted a high level of precision in calculations; calculations could be made to 4 or 5 significant digitsThe fuller calculator, is a cylindrical slide rule with a helical main scale taking 50 turns around the cylinder. There is a papier-mache cylinder fastened to a mahogany handle. A second papier-mache cylinder is a slide fit over the first. Both cylinders are covered in paper varnished with shellac. A brass pointer with an engraved index marker at its tip is attached to the handle and a second brass pointer is attached to the top cap. On the outer cylinder is a helical logarithmic scale 500" (41'8" or about 12.5 m) in length. This cylinder can be slid and rotated upon the inner one and hence with the correct sequence of movements, multiplications and divisions can be made and the answers read off the two pointers which project over the cylindrical scale.FULLER CALCULATOR inscribed on brass pointerscientific instrument, mathematics, calculating

Yields information about ESCo tram No. 18 and the way it was presented about 1930.Black and white photograph contained within Reg. Item 2488, page 27, of ESCo No. 18, side on view of tram showing arrangements after windscreens installed and seats reversed. Photographed at Grenville St., after the large tramway shelter removed. Tram fitted with a Suttons Pianos and Players roof ad board. Has an "Enter Front End" sign on the rear of the tram. Photo about the mid 1920's On the right hand edge of the photograph is a faint stamp "Richards & Co / Photos". Alongside photo is a handwritten not on the size of the motors fitted to the various ESCo trams and the weight of the trams. Note Item Not formally Numbered. Image btm2489i3 shows position on page relative to items 2489, 91 and 92. 2490.1 - Electronic copy of same photograph donated by Ron Hann on a CD of photographs given to him at the time of his visit in January 1963 by the Manager. Refer to email held with item 3841. Added 28/2/2010. See Reg Item 4568 for the CD. High Res Images added 15/3/2011. See Reg Item 1879 for other copies of this photograph.Numerous on page, mainly in ink and pencil.tramways, trams, esco, grenville st, motors, suttons, tram 18

J. Mann and Sons was first established as a farm produce store in 1921. The range of products was extended in the 1930s and included groceries and hardware, as well as the first petrol bowser in Wodonga outside the store. After WWII, the premises were extended and the range of products continued to increase. In the 1960s the Mann Family opened a new supermarket in Wodonga, in addition to the hardware business, providing steel, plumbing and industrial supplies, and they employed over 100 people at one stage. With changes in the retail industry, the Mann Family sold the main hardware business to Bunnings and the steel and rural produce business to the Kelly brothers in 2006. Mercury Scales was founded in Thebarton, South Australia in 1946. The business experienced rapid growth, leading to its joining with A&D’s global organisation and evolving into A&D Mercury. IN 2023 A&D Weighing is an Australian leader in the supply of electronic weighing scales, balances, metal detectors, checkweighers and weighing systems. This model was approved on 13 February 1980. On 25 March 1988 approval to change the business name to A & D Mercury Pty Ltd was granted by the Australian National Standards Commission. A set of cast iron scales. The measurement on the balance arm is in kilograms. There are 2 trays suspended by chains. bas is fitted with a level indicator and four adjustable feet.On Manufacturer's plate: MERCURY SCALE CO. PTY. LTD. SCALE MANUFACTURERS THEBARTON, S. AUST. INSTRUMENT APPROVAL NUMBERS N.S.C 6/9A/109 M/C No. Q. 760253 CAP 101 kg MODEL No. 211 Cj. mann & sons, mercury scales, wodonga businesses

This 35mm Westrex 14 projector was purchased from Waverley Theatre (Cnr Burke Road and Waverley Road in Malvern, in 1962) last used by "Cosmopolitan Motion Pictures" as follows: from 1962 to 1967 - National Theatre, Richmond. from 1967 to 1970 - in a small leatherette on Bridge Road, Richmond. from 1971 to 1985 - Galaxy Theatre Brunswick. After that it was stored at the back of Westgarth Theatre in Northcote. This projector has a primary historic significance as it covers the largest part of the history of film shows by "Cosmopolitan Motion Pictures", and cultural/social significance since it has been used to project a number of other language films (about 10 different languages) by the company. It also carries a secondary significance of rarity being the last used projector by the company at Galaxy Theatre.This metal (most probably steel) projector is part of a number of projectors owned by "Cosmopolitan Motion Pictures". It is in dark blue/grey colour and still operational to project 35mm films if needed. It has two inscriptions detailed below and was last used at Liberty/Galaxy Theatre in Brunswick in 1985 (for more details about the history of Galaxy Theatre follow this link http://technicolouryawn.com/?page_id=2988)INSCRIPTION 1 (red background) Westrex 14, High Intensity Arc Lamp, Serial Number A.5401018. Manufactured for Westrex (Australia) Pty. Limited by G.B.H. Electronic Laboratories - Made in N.S.W. Australia INSCRIPTION 2 (blue background) Westrex R4A Reproducer Made in Australia Western Electric Co. (Aust) Pty. Ltd.projector, film, culture, language, greek, entertainment, γιαννούδης, yiannoudes, προβολέας

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