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

.1 - Book - 8 pages + grey covers, side stapled, issued by the Australian Standards Association, "Electrical Voltages and electrical frequencies for new installations ", C1 (a&b) - 1926, December 1926. .2 - Book - 36 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Overhead Line wire material for telegraph and telephone purposes", C3-11-1925, November 1925. .3 - Book - 20 pages + brown covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Telephone cable, paper insulated lead covered", C12 - 1928, January 1928. .4 - Book - 24 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Marking for Switchboard bus-bars and connections" C13 - 1925, December 1925 - with a pasted green label noting that the "tentative standard is now endorsed as Australian Standard without amendment" - dated Oct. 1930. .5 - Book - 32 pages + grey covers, side stapled, issued by the Australian Standards Association, Tentative Australian Standard "Dimensions and Resistances of Bare Annealed Copper Wire for Electrical Machinery and Apparatus", C 18-1926, October 1926. .6 - Book - 12 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard "Slate Slabs for Electrical Purposes", C19 - 1926, July 1926. .7 - Book - 16 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Moulded Flat Top Insulation Bushes" C20-1926, October 1926. .8 - Book - 16 pages + brown covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Australian Standard "Insulation dimensions and resistance of enamelled plain copper wire for instruments and apparatus" C21-1928, January 1928. .9 Book - 20 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Watertight Glands for electric cables" C22-1926, September 1926. .10 - Book - 20 pages + grey covers, side stapled, issued by the Australian Commonwealth Engineering Standards Association, Tentative Australian Standard - "Air-break knife switches and laminated brush switches for voltages not exceeding 660Volts" - C23 - 1926, August 1926" On top right hand corner has the date stamp of the "The Electric Supply Co. of Victoria Ltd Ballarat" trams, tramways, power station, standards, materials, electrical systems

Land title documents trace the ownership of what is now known as Greensborough Park from 1872 to 1976.This property was owned at various times by well known Greensborough identities. The documents show the change from private ownership to public ownership of the site.Folder of copies of land title documents. 20 pages. Includes CD of electronic copies.greensborough park, banyule city council, shire of heidelberg, shire of diamond valley

Land title documents trace the ownership of land owned by the Partington family of Greensborough.The Partington family are Greensborough pioneers and have lived in the area since the 1840s.Folder of copies of land title documents. 36 pages. partington, plenty river, banyule city council, shire of heidelberg, shire of diamond valley

Henry Sutton is a talented world-wide accepted inventor with inventions relating to the telephone, photography, wireless, cars, motorcycles, and bicycles as well as many more inventions. Henry was also one of four brothers that ran the Sutton's Music Store after the death of their Father Richard Sutton. Henry Sutton taught Applied Electricity at the Ballarat School of Mines in 1883 to 1886.Set of three string bows in a leather case made by W.H. Harling and owned by Albert Sutton son of Henry Suttonhenry sutton, albert sutton, w.h. harling, mathematical instruments, string bows

Periscope Binocular - Green except for section that the eyes look into.MKI /3 MILS 1240-66-022-4932. 1952 AK&S PB 7584binocular - periscopic.

Periscopic Binocular Case - Green Has two latches to close lid,and chain.Binocular. Periscopic, A.F.V. Cased MK1/3 m L5 1240 - 66 - 052 - 4953 Case 053087A /AK & Sbinocular periscopic