Probably used in Ballarat School of Mines blacksmithing classesMetal stricker's Forging and Blacksmith tongs. Strong metal jaws to hold and move metal during processing. Hook at end on one handle to assist control. ballarat school of mines, blacksmith, forge

These books were used by Charles Bacon while studying Metallurgy. Donald Liddell was a metallurgical engineer and former Secretary of the Mining and Metallurgical Society of America.Two red hard covered books with black and white illustrations and index .1) Recovery of Metals .2) Principles and ProcessesInside front cover 'Charles Bacon'

The Moulin Legumes No. 3 food mill is a useful manual kitchen utensil for milling, sieving, grating and pureeing various food types (legumes, vegetables, fruit and herbs). The food is placed in the chamber and the handle is turned to push the food through the holes in the blades and into a bowl placed below it. The various blades allow choice of consistency as they have different sized holes. It was in use before electric food processors were invented and is still used in modern times. The vegetable mill was invented by the French inventor and industrialist, Jean Mantelet, in 1932. Inspired by his wife, he invented the mill, which simply and quickly made cooked food into puree or mash. He said "My greatest pride is to rid women of a daily chore." The business started using the brand Moulinex in 1956 and today is it a household name linked to useful and good quality kitchen utensils and aids. The name comes from combining the words Moulin Express, which was an electric coffee mill. The embossed text "BREVETE S G D G" was a type of French patent without a government guarantee. It stopped being used in 1968. This Moulin is an example of a kitchen utensil used before electric food processors were invented, and had gained popularity to process foods such as vegetable's, fruit, nuts and herbs in a domestic or commercial kitchen. The first model of the Moulin Legunes was invented in 1932 by French industrialist Jean Mantelet to meet the reduce labour for housewives in the kitchen. Millions of this labour saving device have since been sold. Food mill, metal, for manually processing food. Conical-shaped food chamber, two U-shaped handles on opposite sides, two clips inside. Three interchangeable twelve-sided cutting blades, each with different sized holes. Made in France. Model is Moulin Legumes No. 3. Impressed into the side, within a circle "MADE IN FRANCE - BREVETE S G D C -" and in centre "2" (Brevete is French word for Patent)flagstaff hill, warrnambool, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, made in france, french kitchen utensils, moulin, food preparation, kitchen utensil, food mill, food processor, sieve, moule, mouli, grater, puree, hand operated, moulin legumes no. 3, vingage, kitchen gadget, moulineux, jean mantelet

M. Eissler A.I.M.E. was a member of the Institute of Mining and Metallurgy.Red Hardcovered book of 678 pages with around 250 illustrations and numerous folding plates. Contents include: gold mining in California, Gold as a metal; Hydraulic Process; treatment of Gold bearing Ores; Crushing and Amalgamation (Queensland, California); Mills; Buddle; concentrator; Roasting ores; Roasting Pyritic Ores; Hydro-Metallurgy; Chlorination; Electro-Metallurgy; Cyanide; Erection of a Cyanide Plant; Chemistry of the Cyanide Process; Spelting, CupulationCrushing ore; 160 stamp battery; Mill site and battery; causes of failure in gold mining, South African Gold Fields; Gold in Australia (pg 589) Advertisements include: Fraser & Chalmers; Bowes scott & Western Ltd; Fried. Krupp Grusonwerk; Stanley; Humbolt Engineering Works Co., Townson & Mercer.gold, mining, metallurgy, pyrites, cupel, brook, rand, california, america, gold mining

This preliminary report relates to 32½ acres of council owned land in West Warrnambool bounded on the North by McMeekin Road, on the East by Scott Street, on the South by Evans Street and on the West by the rear boundaries of properties facing Landmann and Granter Streets. In 2010, West Warrnambool was the largest of Warrnambool’s existing industrial areas, comprising approximately 109ha of industrial zoned land, the majority of which (101ha) is zoned IN1Z, with the remainder zoned INZ3. The area comprises a mixture of lot sizes supporting a diverse mix of industries. Larger parcels are occupied by the abattoirs, scrap metal industries, freight, the Council Depot and storage. Smaller lots are occupied by smaller manufacturers and wholesalers and service industries. [Ref: Warrnambool Industrial Land Use Review. Mesh Pty Ltd July 2010]This document is a preliminary report prepared by the Warrnambool City Council Engineer in March 1973 and provides an example of the planning process undertaken to develop one of Warrnambool's industrial areas. It contains details and costings of the proposed subdivision. Two foolscaps size pages of typewritten information. A detailed topographical map of the area with areas highlighted in blue, red, green, blue and purple pen.warrnambool city council, west warrnambool, industrial estate

This bean slicer was made about the 1920s by the British firm of Spong & Co. This firm was founded by James Osborn Spong in 1856 in London. James Spong invented over 100 labour-saving devices during his lifetime and his firm became well-known for its production of domestic labour-saving and safety devices, especially its grinding machine and its bean slicer. These domestic items were to be found in most households from the 1880s to the 1950s prior to the advent of electrical items that carried out similar labour-saving processes. This bean slicer is of interest as a reminder of the many labour -saving devices that were available to most women early in the 20th century, even those in the rural and more remote areas in AustraliaThis a heavy metal bean slicer with a circular piece with a rounded cut-out at the top for the insertion of the bean and an attached bolted handle with a wooden top. Attached to the circular top is a circular revolving piece with three cutters. Welded on to the top piece is a metal clamp with a large screw for attaching the slicer to a table or bench. The slicer is painted green and has the name of the manufacturer etched on the top piece.Spong & Co Ltd Made In England No 632 Bean Slicervintage bean slicers, spong & co london, vintage household items

This bean slicer is one of the household labour-saving devices that became increasingly popular in the early to mid 20th century. In those times vegetables such as beans were often grown in the backyard of a house or farm and bean-cutting was a laborious task, especially when providing for a large family. Processed sliced beans were not then freely available.This bean slicer has no known local provenance but is retained as an interesting example of a 20th century household labour-saving device. This is a metal object with a round disc with three metal blades underneath on a turntable for slicing. The blades are attached by six screws. There are two funnels on the top of the disc for inserting the beans. A handle that turns the blades is attached by a screw to the round disc. Attached to the disc also is a vice that enables the slicer to be bolted to a bench or table. The slicer has been painted green but the paint is wearing off and the whole object is rustywarrnambool, bean slicer, household items

This tub probably dates from the early to mid 20th century and would have been a common item in households in those times. It could have been used for laundry items or for other washing processes in the kitchen. Wash houses in the early to mid 20th century were usually separate buildings or sheds outside of the house.This item is retained for display and discussion purposesThis is an oval- shaped metal tub wider at the top than at the base. It has a ridged top, a strengthening metal band around the base and two metal handles. It is somewhat rusty.vintage household items, warrnambool & district historical society collection

Elmac Hydroponics operated at Allansford from 1997 to 2004, growing tomatoes hydoponically. The owners were Keith Ellerton and Graeme MacLeod. There were 2000 Square metres of hothouses with over 5000 plants. This trophy from the Victorian farm Entrepreneur Awards was for the use of a system called autopots. This system relied upon a process of automatic watering through valves at the bottom of the pots.The growing of vegetables hydoponically was a relatively new and innovative system of agriculture. The Elmac business proved that it could be done in the climate of the region. Timber shield shape with bevelled edge, painted dark maroon with engraved brass metal plaque.Victorian Farm Entrepreneur Awards 1999 Regional Winner South West Elmac Hydoponicsallansford, elmac, keith ellerton, graeme mcleod, elmac tomatoes, victorian farm entrepreneur awards 1999.

These 10 photographs were taken over two decades from the late 1950s to 1979 at the Army Survey Regiment, Fortuna, Bendigo. The two photos taken in 1961 are annotated with named personnel and the date. The other photos are not annotated with dates, locations and names of personnel, although the technicians in the last three photos taken in 1979 are positively identified. The photos were most likely taken in the Ballroom, Ante Room and Attic, Cartographic Squadron’s main production rooms on the top floor of Fortuna Villa. Scribing was the cartographic process of drafting topographic features such as drainage, relief, vegetation, roads and culture on specially coated map reproduction material. The cartographic technician scribed out the map feature such as a creek to a specified line width on the map sheet, using a tool affixed with a metal or sapphire tipped cutter.This is a set of 10 photographs of technicians scribing topographic features at the Army Survey Regiment, Bendigo. 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 in Cartographic Squadron .2) - Photo, black & white, c1960s. unidentified personnel in Cartographic Squadron .3) - Photo, black & white, c1960s. unidentified personnel in Cartographic Squadron Attic .4) - Photo, black & white, c1960s. Cartographic Squadron Attic .5) - Photo, black & white, Oct 1961. L to R: PTE P. Carseldine, PTE H.S. Pasley, PTE C.A. Brown, WO2 M.A. McLaren, CPL Jennifer H. Murray. Cartographic Squadron .6) - Photo, black & white, Oct 1961. CPL Jennifer H. Murray. Cartographic Squadron .7) - Photo, black & white, 1979. SPR Mick Ellis in Cartographic Squadron .8) - Photo, black & white, 1979. SPR Mark Casey in Cartographic Squadron .9) - Photo, black & white, 1979. SPR Sharon (Jones) Treble in Cartographic Squadron .10) - Photo, black & white, 1961. PTE BJ Madex. Cartographic Squadron.1 to .4 - annotated “Scribing” .5 – annotated “Scribing PTE P. Carseldine, PTE H.S. Pasley, PTE C.A. Brown, WO2 M.A. McLaren, CPL Jennifer H. Murray. Oct 1961” .6 - annotated “Scribing CPL Jennifer H. Murray. Oct 1961” .7 to .9 - annotated “Scribing” .10 – annotated “PTE Madex Oct 61”royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr, carto

This is a set of 23 photographs of cartographic, aero-triangulation and lithographic equipment, and personnel at the Army Survey Regiment, Fortuna, Bendigo circa 1979. Photos .8P to .23P were taken in Lithographic Squadron’s printing, Camera, proofing rooms and external buildings. Cartographic Squadron’s SGT Jim McDonald operated the Editwriter type setting machine, as shown in photo .2P for a couple years in a room on the top floor of Fortuna Villa. This is a set of 23 photographs of cartographic, aero-triangulation and lithographic equipment, and personnel at the Army Survey Regiment, Fortuna, Bendigo, c1979. Black and white photos are on photographic paper and mounted on manilla card. They were scanned at 300 dpi. .1) - Photo, black & white, c1979, Typesetting machine, ‘Editwriter’ Model 7500, SGT Jim McDonald. .2) - Photo, black & white, c1979, Processor Model ACP101 & dual disk module (attached to Editwriter). .3) - Photo, black & white, c1979, Duplicating machine, stencil process electric ‘Gestetner’. .4) - Photo, black & white, c1979, Comparator photogrammetric stecometer, modified ‘Carl Zeiss’, CPL Jack Elverd. .5) - Photo, black & white, c1979, Point transfer device ‘Wild PUG IV. .6) - Photo, black & white, c1979, Zoom transfer scope, stereo ‘Bausch & Lomb’ .7) - Photo, black & white, c1979, Stereoplotter analytical automatic, ‘APC/3-1’. .8) - Photo, black & white, c1979, Prophylaxis unit, ‘Densply/Cavtron’ .9) - Photo, black & white, c1979, Machine punch register (made by Bendigo Ordnance Factory). .10) - Photo, black & white, c1979, Plan printer 122cm (48”) wide. ‘Admel Bruning’ Model - 5003A. .11) - Photo, black & white, c1979, Metal halide printing lamp. ‘Violight 5000 HV’ .12) - Photo, black & white, c1979, Densitometer transmission or reflection, ‘Macbeth’ Model – TR 524 MD. .13) - Photo, black & white, c1979, Machine whirling vertical type ‘Payne VLW’. .14) - Photo, black & white, c1979, Densitometer reflection, ‘Macbeth’ Model – RD917. .15) - Photo, black & white, c1979, Densitometer reflection, 240V ‘Cosar’ .16) - Photo, black & white, c1979, Printer contact ‘Hohlux’ Model RP-II, LCPL Martin Van der Maele. .17) - Photo, black & white, c1979, Frame printing vacuum vertical. .18) - Photo, black & white, c1979, Frame printing vacuum flip top 91cm x 117cm. .19) - Photo, black & white, c1979, Printer reduction stereo plotter diapositive ‘Wild’ Model – U3A modified and U4A modified to U4A plus. .20) - Photo, black & white, c1979, Printing press offset rotary lithographic 3 colour ‘Ultra-MAN-III’ .21) to. 23) - Photo, black & white, c1979, Camera cartographic consolidated super 100 32” x 32”The three personnel appearing in this set are identified. Most items have a full description, NSN, serial number, and the Repairer’s name, address and phone details and contact name. Just the full description is documented.royal australian survey corps, rasvy, army survey regiment, army svy regt, fortuna, asr

Book is a training manual for the Standing Orders for Vehicle Operation & Servicing 1961 used by the RAASC School for Training Purposes.Metal bound book, brown in colour with dark blue edging on front and back covers. 93 pages inside covering Procedures and Processes for Vehicle Operations and Servicing.On top front, SGT A.K. Teale (or Seale) ? and No. 20 in pencil. Inside says "RAASC School - This copy belongs to school Headquarters Library". Cover says "Restricted", "Australian Military Forces" & "Standing Orders for Vehicle Operation and Servicing 1961".training manual, raasc, passchendaele barracks trust

This type of butter churn was used around the early to mid 20 century by household and small farms of the Kiewa Valley who kept cows for Milk. The buy product of the milk was cream and butter. Once the cows had been milked, often by hand, women would place the milk in shallow dish, and next morning the cream would be separated from the milk. Or a cream separator machine would be used. The cream would then be churned by the paddles in the butter churner until it formed in butter clumps. Butter Pats would be used to take the butter out and press into triangle butter blocksThis butter churner is significant due to its historical value which explains how butter was made by hand before this process became mechanistically made. Many houses or small farms in the Kiewa Valley had these butter churns to make their own butter for their household or to sell. This has very good interpretation significance as it adds to the history of dairy industry in the Kiewa Valley. Wooden box with a metal handle for turning the blades /paddles /slats inside the box.These blades churn the cream when the handle is turned. There is also a wooden handle and a wooden lid.butter, dairy, milk, manual, domestic, item, food, preparation, dairying, technology

This sewing machine screwdriver likely belonged to Ruby May Selina Wallace (1891-1973) of Inglewood, Victoria. It was donated by an Emerald resident. Several items of clothing owned by Ruby or her mother Ellen Dowsett (1858-1953) are also in the Emerald and District Museum collection; the sewing machine associated with this screwdriver likely played a part in the maintenance, repair and possible creation of several of those items. Sewing machine screwdrivers are still used in the operation and repair of modern sewing machines, but it is rare to find bent wire versions like this item, which was also designed for an older model of sewing machine. This tool is representative of the processes of making and maintaining clothes in early 20th century domestic life, is no longer in common manufacture in this form, and was involved in the creation of several items in the collection.This screwdriver made of bent metal wire consists of a loop (ideal for holding during operation), a shaft bent in a rounded right angle, and a flat head pointing perpendicular to the direction of the loop. The right angle allows for more turning force to be applied through the head of the screwdriver than would be possible with a straight version, and makes it easier to access certain parts of the sewing machine.N/A1920s, textiles, clothing

Foodstuffs - part of a 1 man 24 hr ration pack. .1) & .2) Metal cylindrical tins of Kraft Processed Cheddar Cheese, 56 g net. .3) Packet, dark green paper containing instant noodles. .4) Packet, dark green paper containing muesli bars. .5) Packet, dark green paper containing survival biscuit. .6) Packet, mid green paper containing army chocolate. .7) Packet, fawn paper containing salt. .8) Packet, clear cellophane containing sugar. .9) & .10) Tea bags with label & string. .11) Foil paper wrap of lollies.military equipment - provisions, passchendaele barracks trust, rations, 24 hour

This tuyere (word from French origin) was used by professional blacksmiths and or cattlemen before and during the Kiewa Hydro Electricity Scheme was being constructed. The need to use a furnace or forge in the shaping of metal rods, horse shoes and pipes is both a rural necessity and a construction, on site requirement. The "inventiveness" of cattlemen and construction workers to produce metal objects not available "off the shelf" is one of the inherent traits not only of rural self sufficiency but in the "pioneer" days of rural isolation one of survival.This tuyere is of great significance to the Kiewa Valley and its regions because it highlights one of the greatest strengths of the rural (especially isolated) life and its folk living there, and that is the great human factor of adaptability and survival techniques in sometimes harsh and demanding environmental circumstances. The inventiveness and the attitude, "she'll be right mate", demonstrates life on the land where specialised blacksmith activities can be found in non "professionals" because of the fact that "someone" has to do the job. This is one of the differences between country "rural" life and that found in cities and larger towns.This iron cone shaped tuyere has a small hole (diamenter 25mm) starting within an ever enlarging cone (amplification of the air pressure going through) delivering varying hot or extremely hot air into a furnace or hearth which intensifies the heat to allow the "shaping" of metal objects. The larger "flared" cone extension allows for the directed air to be spread and not concentrated.blacksmith tool, tue, bellows, fashioning metal, forge manufacturing process

We have been unable to find a brand name or identify any identical items online or in other collections, indicating that this may be a custom-made tool designed specifically for use on a nursery - potentially C.A. Nobelius' nursery. It appears to be a foot-pedal operated hole punch, designed to reliably puncture metal pots for orchard trees. In the 1940s, the Nobelius nursery began to lift trees from the ground and sell them in pots rather than as bare-rooted plants; at this time, plastic was not yet widely available and many discarded biscuit or fruit tins were reused as pots. Potted trees required regular watering, and holes in the bottom of the pot for water to run out from; this hole punch may have facilitated an easier potting process until the popularisation of plastic pots in the 1960s.This item was a tool used in nursery practices in the 1940s, potentially including on the Nobelius nursery. Similar items are rare or difficult to find.This item rests on a cross base, with holes in each of the cross arms to allow it to be secured. The lower third of the central shaft is hollow, allowing for a foot pedal to descend through it. The middle third of the shaft is also hollow, with a loose central section affixed to the foot pedal moving up and down within it. In the upper third of the shaft, the hollow outer layer ends, and the mobile inner shaft is wrapped in a spring and affixed to the crossbar at the top of the item. Four small fixed crossbars also emerge from the sides of the middle third, attached to vertical rods through a rotating joint; the vertical rods attach with another rotating joint to pieces emerging through through the upper crossbar surface and ending with sharp points. The base and central shaft was painted yellow, and the upper crossbar head is painted red, though both are heavily faded. Together, these parts form a contraption that, when the foot pedal is pressed down, pulls the head downwards, in the process rotating the pointed pieces inwards to puncture the item placed on the head. When pressure is released, the spring returns the head to its initial position.N/Anursery, tools

By the late 1800s increasing numbers of Australian working men had at least one good suit as a sign of respectability. Suits could be purchased ready-made, made to measure from a local tailor. The introduction of electric irons meant that the old flat irons and gas stove no longer had to be used. This electric iron would have been used to flatten seams during the tailoring process. This item is representative of a now rare craft that has diminished in the contemporary world.An electric tailor's iron. It has a green base and a black handle. The body of the iron has a flat back and curves to a point at its front. Its handle is metal and is attached with large screws at the top and back side of the base. The top of the handle is covered in black plastic that has finger grooves. there is a black iron resting stand.

The invention of a hand drill is credited to Arthur James Arnot and William Blanch Brain of Melbourne, Australia who patented the electric drill in 1889. In 1895, the first portable handheld drill was created by brothers Wilhem & Carl Fein of Stuttgart, Germany. Hand-powered devices have been used for millennia. However, during the last quarter of the 19th century a radically improved generation of tools appeared. These tools took advantage of modern mass production machinery and processes (like interchangeable parts) and an increased availability in superior material (metal instead of wood). One of the outcomes included an array of new drilling machines. These human-powered tools were a vast improvement over earlier tools.This item is an example of a commonly used domestic tool - pre power tools.A Stanley hand drill with two wooden handles. The red wheel is painted metal. On red wheel - STANLEY ENGLANDwoodwork tool hand-drill

Used domestically, though any extra butter could have been sold to neighbours. Many families kept a cow or two for milk etc. Cream needed to be at least 2 days old - the thicker the better. The handle was turned until the cream turned to butter,the whey was poured off and the butter washed in cold water until the water ran clear. Generally salt and bicarbonate of soda were added. Two pats were used to form butter into 1lb lots. This butter was most typically meant for consumption by the family, but in some instances it may be taken away for consignment by commercial receivers of dairy produce. This item is typical of the period when food processing was done at home. It would have been before the time of mass food processing factories.A metal butter churn with cast iron hand crank on side. The bowl container has a steel lid. It sits on a tripod stand.dairy butter-churn farming

Phonograph cylinders are the earliest commercial medium for recording and reproducing sound. Commonly known simply as "records" , these hollow cylindrical objects have an audio recording engraved on the outside surface, which can be reproduced when they are played on a mechanical cylinder phonograph. The "Gold-Moulded" process was developed in 1902 and involved creating a metal mould from a wax master; a brown wax blank would be placed inside and heated . as the blank expanded, the grooves would be pressed into the blank which would then be cooled. The "gold" is derived from the traces of that metal used as a conductive agent in the initial mould. "Whistler and his Dog" was performed by the Edison Military Band.Edison Records was one of the earliest record labels which pioneered sound recording and reproduction and was important in the early recording industry. Gold Moulded records used a process that Edison had developed, that allowed a mould to be made from a master cylinder which then permitted the production of several hundred cylinders to be made from the mould. Previously cylinders were recorded live or by hooking two machine together to copy from one cylinder to another, and they used softer brown wax which wore out in as few as twenty playings. Gold Moulded Records were discontinued in 1912.A cardboard cylindrical record container. It is an Edison Gold Moulded Record container. The label has red and gold print and a photo Thomas A. Edison.Hand-written on lid - Whistler & His Dogedison-gold-moulded-cylinders sound-recording records

This preserving jar was used in the first half of the 20th century to preserve cooked food - pickles. Preserving home produce in bottles is a method that applies heat to food in a closed glass home canning jar to stop the natural spoilage that would otherwise take place. It removes air from the jar to create a seal. he bottling process forms an air tight seal between the bottle and the lid. Residents of Orbost have long been self sufficient growing their own fruit and vegetables with earlier market gardeners They preserved their produce for use all year. Fowlers Vacola preserving kits were common in most kitchens.A brown glass Fowler's Vacola preserving jar filled with pickles. It is a No. 27 bottle with a size 3 metal clip. It has an 850ml capacity. The lid has metal tension clips which are secured during the canning process and are removed once a vacuum seal has formed. The lid is tin-plated with a lacquer coating, double-coated on the underside.On lid Fowlers Vacola Size 3 Top of jar- embossed with the words Fowlers Vacola food-preservation fowlers-vacola container-glass

This item would have been very common on farms throughout the Orbost area. Prior to bulk milk, cream was the major commodity which was sold to the butter factory. This is a small separator, typical of home use. This domestic kitchen appliance is typical of the period when food processing was done at home. It would have been before the time of mass food processing factoriesHand operated rusted metal cream separator with metal and wood handle.Front - A.O Handle-75.T.PR.MIN Back- (RHS) A.O. (LHS) Co-op in outline of Australia.cream-separator domestic-food-preparation dairy-farming

This is one of many models of the Enterprise Tinned Meat Chopper No5This domestic kitchen appliance is typical of the period when food processing was done at home. It would have been before the time of mass food processing factoriesSmall black metal meat grinder with screw down grip for use on bench tops and tables. Still in working order. Carved wooden handle.Enterprise MFG.Co. PH'A, U.S.A. on clamp. Pat.Jan.30.83.June.5.88 on other side. Enterprise-Tinned-Meat-Chopper on barrel.grinder domestic food-preparation enterprise-mfc

This domestic appliance is typical of the period when food processing was done at home. It would have been before the time of mass food processing factoriesBlack metal grain grinder. Top slides off to collect the ground grain. Opening at top to pour in grain. The back has holes to screw or nail to bench. There is a long grinding arm of metal with a wooden handle.Underneath -3 Under storer - T&C Clark & Co - Wolverhampton Bottom of handle - Clark & Cogrinder food-preparation domestic clark-t&c

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.

This specimen was recovered from Mica Schist, Canada. Chalcopyrite is a copper iron sulfide mineral with a chemical composition of CuFeS2. Its name derives from the Greek words for copper (chalco-) and brass (pyrite). It can be found in shades of yellow, green and grey, and, when exposed to acid, it can change to purple, blue, violet and yellow tones. Weathering can cause loss of its metallic luster and its brass-yellow colour. Chalcopyrite forms under various conditions, with the most significant deposits being hydrothermal in their origin. It is known globally as the most important ore of copper for thousands of years, and is thus considered a very important mineral formation. Given its golden appearance, it is often confused for the mineral gold, earning it the popular reputation as 'fool's gold' or 'yellow copper'. However, it can be straightforwardly distinguished from gold; the latter is soft, with higher specific gravity and a yellow streak, whereas chalcopyrite is brittle, easily scratched by a nail, and has a greenish grey streak. Copper was the first metal that was used by people. It was discovered by the Neolithic man about 9,000 years ago and it gradually replaced stone as it was easier to be shaped. In Australia, search for copper began after the European settlement, leading to the discovery of substantial deposits, like the one at the Olympic Dam in South Australia, which is regarded as one of the largest copper deposits in the world. Chalcopyrite has been used for copper since smelting processes began approximately five thousand years ago. Although by no means rare, this the specimen of this mineral can be used to reflect a wider history of industrial uses of copper for a significant portion of human history. 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 solid hand-sized copper iron sulfide mineral of brass yellow, often with an iridescent tarnish, with greenish-black streak and submetallic luster. Chalcopyrite can be formed in several ways, including crystalizing from accessory minerals in igneous rocks, or from magma or within volcano sulfide deposits. Most commonly, chalcopyrite are found in hydrothermal conditions, where it forms in hydrothermal veins. As a member of the tetragonal crystal system, it often takes the shape of tetra-headed crystals, often with striations along the sides of the crystals. #18 Copper pyrites/(chalcopyrite) in/Laurentian Slate/(page 315 of inventory)/page missing from/descriptive catalogue/ Other label: 81 /fool's gold, chalcopyrite, mineral, rock, geology, geological, hydrothermal, neolithic, european settlement, olympic dam, south australia, stone, deposits, specific gravity, greenish grey streak, brittle, mineral gold, metallic luster, cufes2, greek words

The photo from 1907-8 is a sepia print, depicting a small valley with building at base. There are flumes visible above areas of water, trees on hills and a few small cottages on the hillside. Cock's Pioneer Gold & Tin Sluicing Co NZ No 2 Site. The photo was taken of Matthews Gully looking west. Sluicing was undertaken in the area from 1900 to 1942 with some short breaks between these periods. The image depicts a location mined by Cocks Pioneer Gold and Tin Sluicing Company (as recorded on the annotation on the card mount) The Cocks Pioneer Gold and Tin Mines N.L was one of El Dorado's two largest open cut sluicing mines of the 20th Century. The other was named the Cocks El Dorado Gold Dredging Company. The Cocks Pioneer Mines operated from 1901 until 1941 and found a total of 117,378 ounces of Gold and 1,673 tones of tin concentrates over these years. The Cocks company was formed in 1898 and operated until 1941. Open cut sluicing involved the use of high-powered hoses which used the centrifugal sand pump system (known as hydraulic sluicing) which broke down the soil which was then processed for gold and other precious metals. From 1914 , four years after this image was captured, the company reformed to Cocks Pioneer Gold and Tin Mines NL (previously it was known as Cocks Pioneer Sluicing Co) and undertook large scale sluicing operations until 1929 and then 1934-1941. El Dorado is located on Reedy Creek and is surrounded by forested country to the north and east. It is 20 km east of Wangaratta in Victoria's regional north-east. John Cock was the son of a Cornish minor who arrived in El Dorado in 1858. Cock founded his gold and tin mining company which ran successfully for many years in the El Dorado region. It was an open cut sluicing company because of the abandonment of underground mining after this was deemed too dangerous. In 1935 Cock's El Dorado Company commissioned the floating dredge which is still visible in El Dorado today. The dredge was built by the Thompson engineering works, Castlemaine, and weighed over 2,000 tones and today has a place on the Victorian Registers of historic buildings. Interestingly, the name El Dorado does not derive from the gold in the region, but from the Barambogie pastoral run completed by William Baker in 1840-1841. Gold was discovered in El Dorado 1854 but the gold was too deep for individual prospectors to find, it required the use of heavy machinery.The search for gold is ingrained into the history of Victoria and therefore, images like this one which portray an open cut sluicing site can reveal important information for society and technology for the date when the photograph was taken. This image is of important historical significance for its ability to convey information about sluicing and the methods used to find gold in 1910. It also shows a location where sluicing was undertook which provides insight into the impact of sluicing on the environment at a time when it was done. This image is important for current research into the history of El Dorado, a small regional location near Wangaratta in Victoria's North East. Therefore, this image has the capacity to be beneficial for research into society and the motivations of those living and working in this region during this period and therefore, has social significance. The Beechworth Burke Museum has additional images relating to gold sluicing and El Dorado which can be analysed and studied alongside images like this one.Sepia coloured rectangle photograph printed on gloss photographic paper Reverse: 1997. 2613/ A02613/ No2 site/ Matthews Gully/ Cocks Pioneer G&T. ?? Co NZ/ No2 Site looking West/ 1907-8/ (7)sluicing, hydraulic sluicing, 1907, 1908, mining, cock's pioneer gold & tin sluicing co nz, nz, site no 2, matthews gully, west, valley, building, cottages, hillside, trees, water, gold and tin mine