The image of Ballarat Trustees relates to a building on the corner of Mair and Lydiard Streets. In 2010 it was used as Cuthberts law firm.Grey/green soft covered book. Includes photographs and map. Themes include: Ballarat History pre gold, mining, Eureka Stockade, Lake Wendouree, South Street, Grand National Eisteddfod of Australasia, schools, Black Hill, Lake Burrumbeet, Creswick, Buninyong. Illustrations and advertisement include: Sturt Street,James Smith, Ballarat Town Hall, Ballarat East Town Hall, Rowlands, Ballarat brewing Co., Royal Standard Brewery, steam train, Lake Wendouree, J.S. Vickery & Son, trout, Berry, Anderson & co., Ballarat Botanical Gardens and hot houses, Claxton Memorial Fountain, statues, New Imperial Gold Mine, Art Gallery of Ballarat, St Patrick's College, Ballarat Grammar School, Ballarat School of Mines, Ballarat College, Sunnyside Woollen Mills, Ballarat Agricultural High School, Passenger Steamer on Lake Wendouree, Moorabool Falls, Lal Lal Falls, Grosvenor Square, Netherby, Buninyong, Ballarat Motor Garage.ballarat, cuthberts, ballarat trustees, sturt street, tram, trams, ballarat town hall, crag's hotel, sun foundry, eureka aerated waters and brewing co, d. lem, chinese practioner, chinese herbalist, hugh v. mckay, sunshine harvester, gordon brothers, central business college, george hotel, edwards pyrites furnace, long's biscuits, ballarat eisteddfod, george farmer, ballarat botanical gardens, eureka stockade, lake wendouree, ballarat school of mines, moorabool falls, kirks reservoir, ballarat post office, hepburn lagoon, star of the east mine, emu river, ballarat observatory, statues, angus' rialto cafe, carlyon's hotel, clarendon ladies' college, j.e, sang, ballarat coffee palace, stansfield and smith, ballaray brewing company, phoenix brewery, rotal standard brewery, john macleod co, robert sim and co, cobb and co\eagle foundry, j.j. goller and co., mt buninyong lookout, ballarat town hall ballarat east gardens, hot house, glass house, statuary pavilion new imperial gold mining co.,, art gallery of ballarat, st patrick's college, ballarat agricultural high school, lake wendouree steamer, grass trees at mt clear, mount clear, lake burrumbeet, newlyn reservoir trout, lal lal falls, grosvenor square, netherby, ramelli's motor garage, buninyong gold obelisk, memorial, imperial gold mine, botanical gardens lily pond and fernery

Typed letter on The Australasian Institute of Mining and Metallurgy Letterhead requesting information from the Ballarat School of Mines on the Edwards Pyrites Roaster.australasian institute of mining and metallurgy, harry arblaster, edwards pyrites furnace, b.e. jacka, mining, ausimm

This model of a mechanical ore roasting and chloridising furnace was invented and patented by Thomas Edwards of the Edwards Pyrites Smelting and Ore Reduction Company. This new type of furnace produced a high standard of sulphur free ore known as ‘sweet roasted’. Edwards used this model for demonstrations in the USA. Of note is the central large vertical cogwheel (externally driven) which drives small vertical cogwheels via angled cogging drives. These in turn drive a horizontal wheel. Each side of the vertical wheel is set on an opposite side to the horizontal wheel of its neighbours, resulting in opposite direction rotation of neighbouring horizontal wheels. Each horizontal wheel turns a rabble (set of vertical iron paddles) within the furnace. These rabbles, each turning in opposite direction to its neighbours, move the roasting ore in a zig-zag path through the furnace. The elongated furnace with its line of rabbles produced a much ‘sweeter’ roasted ore than could be obtained from a typical tank-shaped furnace. In 1924, when the model was donated to the Ballarat School of Mines, Ballarat’s Courier newspaper reported, ‘Apart from its historical and education value, the gift should serve to stimulate the inventive faculties of the students who have to win fame for the school and for themselves in the metallurgical world.’ The furnace model was donated to Ballarat School of Mines and used as an educational prop from 1924. The model relates to the mining industry which is a significant part of Ballarat's history and heritage. Ballarat School of Mines is the oldest Technical School in Australia and is celebrating 150 years in 2020.Metal model of Edwards' Ore Reduction Furnace. The model includes cogwheels, rabbles and other details. Scale is thought to be around 1:20M259ballarat school of mines, edwards, pyrites, ore reducation, edward retallack, mining, model

"The United Pyrites Company's Works are situated about three quarters of a mile from Spargo Brothers, and are on the northern side of the Marong road, in Pinch-gut Gully. Two processes are followed at these works, viz., the amalgamating process and the treatment by means of chlorine gas. The latter is called the Newbery-Vautin system, and the mode pursued is that laid down by Mr. Cosmo Newbery and Mr Vautin, whose names have been given to the process. Mr. Edwards manages these works. Three reverbatory furnaces are used to roast the pyrites, which is weighed in the truck before being put into the furnaces. At this weighbridge a sample of each lot is kept, and if the yield is not equal to expectation, the works are carefully gone over to see where the fault occurs. Care is taken at the furnace to regulate the heat, otherwise the pyrites might slag instead of roasting evenly right through. An immense revolving furnace (made of boiler iron) was used at these works. It was found to be suitable for treating blanket sand, but was not a success for roasting coarse pyrites. The process of amalgamating by means of Chilian mills is the same in these works as at the Western Works, but the United Works are on a larger scale, and eleven mills are utilised. It is the chlorine gas process which is most interesting here. The gas is made from sulphuric acid, black oxide of manganese, and common salt, and the gas is introduced into huge vats, where it works its way through a filter of pieces of quartz and then through the bed of roasted pyrites lying above. The action of the gas transforms the gold into chloride of gold. This is easily dissolved in water, and in that form is drawn off into huge delf jars, where the use of sulphate of iron precipitates the gold to the bottom. A small battery—eight head of stamps in two boxes—is in use here to crush small consignments of stone sent for trial. Test crushings come from all the Australasian colonies, and even from India. The jars used are manufactured at Epsom, and some of the salt used is also of home manufacture, from the Salt Lakes on the Northern plains. Mr. Edwards took us over a new building in course of erection, and in which the chlorine gas is to be generated in the midst of the pyrites— a still further advancement in the new process. There is some very good machinery in this new building, and the tailings from the ordinary pyrites works will also be treated by this chlorine gas system, which has been found to work well at Mount Morgan, in Queensland. The purest of gold is obtained by this process, the gold passing in solution into a charcoal filter, from which it emerges in the shape of metallic gold. We saw some nice cakes of retorted gold at the works. One of 26oz. was from some New Zealand pyrites (2½ tons), and assayed over 23 carats. There were also cakes of Avoca gold, of silver, and of the tremulous amalgam." (The Argus, 4 February 1887)Two handwritten letters to the Ballarat School of Mines on Bendigo United Pyrites Company Letterhead.bendigo united pyrites company, pyrites, ballarat school of mines, j.j. deeble, joel deeble, joel james deeble, a.m. dean, fred j. martell, martell, s.h. cowan, letterhead