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This illustration shows a Blake Ore Breaker (stone crusher), used in a gold stamp mill. This crusher breaks the large, mined rocks containing the gold (ore) into small pieces, to then be reduced to the finest powder by stamps.

Blake Ore Breaker

This illustration shows a Blake Ore Breaker (stone crusher), used in a gold stamp mill. This crusher…

"A representation of one of the class of mechanical rabbles known as Witham's machine rabble applied to a double puddling furnace." — The Encyclopedia Britannica, 1893

Mechanical Rabble

"A representation of one of the class of mechanical rabbles known as Witham's machine rabble applied…

"The parting vessels are of porcelain which, to protect them against fracture by irregular heating, are covered with wire netting and plastered over with a mixture of clay and smithy scales. They are mounted in a frame and set loose in an iron pot with a hemispherical bottom, which is heated by a fire from below, the pot also serves to catch the contents of the porcelain vessel if the latter should be accidentally broken. The cover is perforated by a hole in the center for the passage of a lead pipe to carry off the sulphurous acid fumes." — Encyclopedia Britannica, 1893

Parting Vessel

"The parting vessels are of porcelain which, to protect them against fracture by irregular heating,…

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with an air course to cool it, c the bed supported on iron plates with air courses under them, f the exit flue leading to the chimney stack, which is surmounted with a damper k worked by a chain i from within the shen in which the forge is placed; b is the ashpit, g the slag-hole, and e the working door suspended by a chain from a lever with the counterpoise attached h, resting on the front side of the furnace roof." — The Encyclopedia Britannica, 1893

Puddling Furnace

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with…

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with an air course to cool it, c the bed supported on iron plates with air courses under them, f the exit flue leading to the chimney stack, which is surmounted with a damper k worked by a chain i from within the shen in which the forge is placed; b is the ashpit, g the slag-hole, and e the working door suspended by a chain from a lever with the counterpoise attached h, resting on the front side of the furnace roof." — The Encyclopedia Britannica, 1893

Puddling Furnace

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with…

"The term "refining," although in strictness applicable to all methods by which impure iron is purified, is in practice restricted to one particular operation practised as a preliminary stage in the puddling process, viz., melting pig iron on a hearth, on which the fuel is piled, the combustion being urged by a blast of air, which also partially oxidizes the iron, both as it melts and subsequently; the molten mass when the operation is complete is either run out into moulds, chilled by throwing water on it." — The Encyclopedia Britannica, 1893

Refinery

"The term "refining," although in strictness applicable to all methods by which impure iron is purified,…

"The term "refining," although in strictness applicable to all methods by which impure iron is purified, is in practice restricted to one particular operation practised as a preliminary stage in the puddling process, viz., melting pig iron on a hearth, on which the fuel is piled, the combustion being urged by a blast of air, which also partially oxidizes the iron, both as it melts and subsequently; the molten mass when the operation is complete is either run out into moulds, chilled by throwing water on it." — The Encyclopedia Britannica, 1893

Refinery

"The term "refining," although in strictness applicable to all methods by which impure iron is purified,…

Refinery Siphon and Alembic.

Refinery Siphon

Refinery Siphon and Alembic.

"The vacuum-pan is in universal use in all European sugar-refineries, and in all well-provided sugar-plantations. It is generally made of copper, of a spherical form, and from six to nine feet in diameter. The bottom is double, leaving a space of an inch or two for the admission of steam between the two bottoms, and there is generally a long coiled copper pipe of three or four inches diameter above the inner bottom, so as to still further increase the amount of heating surface." — Chambers, 1881

Vacuum-pan

"The vacuum-pan is in universal use in all European sugar-refineries, and in all well-provided sugar-plantations.…