Wooden model of a cyanide plant. A cyanide plant was used for dissolving gold from finely divided ores by means of dilute solutions of sodium or potassium cyanides. The model has five metal bins; there is some rust on the bins and scorch mark on the wooden base.mining, equipment, cyanide plant, gold cyanidation (also known as the cyanide process or the macarthur-forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. it is the most commonly used leaching process for gold extraction. the ore is comminuted using grinding machinery. depending on the ore, it is sometimes further concentrated by froth flotation or by centrifugal (gravity) concentration. water is added to produce a slurry or pulp. the basic ore slurry can be combined with a solution of sodium cyanide or potassium cyanide, however many operations utilize calcium cyanide, which is more cost effective. to prevent the creation of toxic hydrogen cyanide during processing, slaked lime (calcium hydroxide) or soda (sodium hydroxide) is added to the extracting solution to ensure that the acidity during cyanidation is maintained over ph 10.5 - strongly basic. lead nitrate can improve gold leaching speed and quantity recovered, particularly in processing partially oxidized ores.

Laminated Photograph of three flags including the Australian flag flying over the 1(AUST) Field Hospital. The document outlines the history of the flag. The flag was believed to be the last flown in South Vietnam apart from the Embassy in Saigion.australian flag 1 (aust) field hospital

In the years of Allan Doney’s photography, landmark buildings succumbed to fire, neglect and redevelopment. He photographed the grey sand hills from Bendigo’s mining past, the streetscapes, poppet heads, miners’ cottages, gracious homes with ornate verandahs, trams and much more. Above all, his photographs show how much of the city has survived from the 19th century – and how much has not. Through two decades of great change, Allan Doney was there to capture ways people interacted with it. Although he travelled to many other places in Northern Victoria and beyond in search of subjects for his art, he seemed to always return to Bendigo for inspiration.

A copy of Vietnam: Australia's Longest War: Rrecalling Vietnam - A Calendar Of Events. See medai files for more information.reginald townley (minister for defecne), australian army training team vietnam (aattv), hon. shane paitridge (miniter for defence), wo2 (temporary) kevin george conway, 13097, royal australian infantry corps, svn, 1st battalion, royal australian regiment, 1 rar, us 173rd airborne brigade, hmas sydney, vung tau, australian national serviceman, apc, wo2 (temporary) kevin arthur wheatley, 29890, killed in action, vc, victoria cross, prime minister harold holt, 1st australian task force, 1atf, raaf, raaf iroquois helicopter, special air service squadron, 9 squadron, first australian logistic support group, 1 alsg, 5 rar, pte errol wayne noack, 4717546, battle of long tan, d company, 6 battalion, north vietnam army, vna, viet cong, 3 troop, 1 apc sqn, wounded in action, us presidental unit citation, maj peter john badcoe, 41400, 103 field battery, farelf, v company, royal new zealand regiment, 2 bn rar, 2rar/nz/anzac, 3 bn rar, tet offensive, baria, phuoc tuy province, a company, fire support base coral, 1 bn rar, mortar platoon, 102 field battery, fire support base balmoral, cneturion tanks, wo2 rayene steward simpson, 217622, distinguished conduct medal, wo keith payne, batle of binh bah, prime minister sir william mcmahon, prime minister sir john gorton, wo2 keith payne, 12222

A copy of Vietnam: Australia's Longest War: Rrecalling Vietnam - A Calendar Of Events. This has an added date for 20 Jul 64 which is handwritten in pencil. See medai files for more information.reginald townley (minister for defecne), australian army training team vietnam (aattv), hon. shane paitridge (miniter for defence), wo2 (temporary) kevin george conway, 13097, royal australian infantry corps, svn, 1st battalion, royal australian regiment, 1 rar, us 173rd airborne brigade, hmas sydney, vung tau, australian national serviceman, apc, wo2 (temporary) kevin arthur wheatley, 29890, killed in action, vc, victoria cross, prime minister harold holt, 1st australian task force, 1atf, raaf, raaf iroquois helicopter, special air service squadron, 9 squadron, first australian logistic support group, 1 alsg, 5 rar, pte errol wayne noack, 4717546, battle of long tan, d company, 6 battalion, north vietnam army, vna, viet cong, 3 troop, 1 apc sqn, wounded in action, us presidental unit citation, maj peter john badcoe, 41400, 103 field battery, farelf, v company, royal new zealand regiment, 2 bn rar, 2rar/nz/anzac, 3 bn rar, tet offensive, baria, phuoc tuy province, a company, fire support base coral, 1 bn rar, mortar platoon, 102 field battery, fire support base balmoral, cneturion tanks, wo2 rayene steward simpson, 217622, distinguished conduct medal, batle of binh bah, prime minister sir william mcmahon, prime minister sir john gorton, wo2 keith payne, 12222