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

The Pilatus B4 is an all metal intermediate sailplane meeting Standard Class rules that was designed in 1966 by Ingo Herbst, Manfred Küppers and Rudolf Reinke. It did not immediately go into production. In 1972 Pilatus Aircraft of Switzerland acquired a licence to build the aircraft and began production. The PCII and PCIIA versions were semi-aerobatic. The PC11AF released in 1975 was rated as fully aerobatic. By 1980, when Pilatus sold the rights to manufacture of the aircraft to Nippi Aircraft of Japan, 322 of the Pilatus B4 had been produced. Nippi Aircraft built a further 13 and also one two seat version. The Pilatus B4 proved popular in Australia with 26 appearing on the Australian register. The Museum’s example is a basic semi-aerobatic type (Serial Number 092) that was built in 1974. It is registered as VH-GID on 8 July 1974 by H.G. Sutton of Mandura, Western Australia and flown out of the Narrogin Gliding Club in Western Australia until September 1986 when it was sold to the Albury – Corowa Gliding Club, New South Wales. In 1999 it was acquired by Michael Green and moved to Townsville, Queensland. The aircraft changed ownership again in 2004 and fell out of use for nearly 4 years. By then it had recorded 4377 hours in the air from 4304 flights. It returned to service briefly in January 2008 (5 flights totalling about 5 hours). It was donated to the Museum by David Millward of the Geelong Gliding Club, Victoria, on 10 April 2017. The aircraft is representative of a popular imported 1970s intermediate single seat sailplane design of aluminium alloy construction.Single seat sailplane of metal alloy constructionWhite colour scheme with yellow fuselage underside highlighted by blue stripe – “Pilatus B4” in black lettering on starboard side of cockpit – black anti-glare paint on the fuselage nose – Registration “GID” on the underside of port wing.australian gliding, glider, sailplane, pilatus b4, sutton, narrogin, albury, corowa, green, townsville, millward, geelong

This specimen was recovered from Broken Hill, NSW. It was given the name Mangan Hedenbergite in 1819 by Jöns Jakob Berzelius in honor of Mr. Anders Ludvig of Hedenberg who was the first to define hedenbergite as a mineral. Hedenbergite, belongs in the pyroxene group having a monoclinic crystal system. The mineral is extremely rarely found as a pure substance. Mangan Hedenbergite is a manganese bearing variety of Hedenbergite. Manganese is the world’s fourth most used mineral after iron, aluminium, and copper primarily because it has no satisfactory substitute in its major applications. Globally, the steel industry is the primary user of manganese metal, utilizing it as an alloy to enhance the strength and workability of steel and in the manufacture of tin cans. Manganese is a key component of certain widely used aluminium alloys and, in oxide form, dry cell batteries used in electric vehicles. These batteries are in high demand. Another potential use for manganese may as an additive to help coat and protect a car’s engine. Manganese is also used for non-metallurgical purposes such as plant fertilizers, animal feed, and colorants for bricks. This specimen is part of a larger collection of geological and mineral specimens collected from around Australia (and some parts of the world) and donated to the Burke Museum between 1868-1880. A large percentage of these specimens were collected in Victoria as part of the Geological Survey of Victoria that begun in 1852 (in response to the Gold Rush) to study and map the geology of Victoria. Collecting geological specimens was an important part of mapping and understanding the scientific makeup of the earth. Many of these specimens were sent to research and collecting organisations across Australia, including the Burke Museum, to educate and encourage further study.A hand-sized mineral specimen in shades of silver and blackmanganese, open cut mine, manganese ore processing, bell bay, tasmania, northern territory, steel industry, zinc-carbon batteries, alkaline batteries, tin cans