Agricola, Georgius
,
De re metallica
,
1912/1950
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>A—FURNACE. B—LADDER. C—BOARD FIXED TO IT. D—HOE. E—FIVE
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TOOTHED RAKE. F—WOODEN SPATULA. G—BROOM. H—RAMMER. I—RAMMER, SAME
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DIAMETER. K—TWO WOODEN SPATULAS. L—CURVED BLADE. M—BRONZE RAMMER.
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N—ANOTHER BRONZE RAMMER. O—WIDE SPATULA. P—ROD. Q—WICKER BASKET.
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R—TWO BUCKETS OF LEATHER IN WHICH WATER IS CARRIED FOR PUTTING OUT A CON
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FLAGRATION, SHOULD THE
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officina
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CATCH FIRE. S—BRASS PUMP WITH WHICH THE WATER
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IS SQUIRTED OUT. T—TWO HOOKS. V—RAKE. X—WORKMAN BEATING THE CLAY WITH
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AN IRON IMPLEMENT.
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two and a half digits thick; the upper part of the rammer, where the handle
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is inserted, is bound with an iron band two digits wide. </
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<
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>There are some who,
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instead, use two rounded rammers three and a half digits in diameter, the
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same at the bottom as at the top. </
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<
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>Some people prefer two wooden
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spatulas, or a rammer spatula.</
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>In a similar manner, mixed and moistened powder is thrown and pounded
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with a rammer in the forehearth pit, which is outside the furnace. </
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<
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>When
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this is nearly completed, powder is again put in, and pushed with the rammer
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up toward the protruding copper pipe, so that from a point a digit under the
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mouth of the copper pipe the hearth slopes down into the crucible of the fore
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hearth,
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11
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and the metal can run down. </
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<
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>The same is repeated until the </
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