Agricola, Georgius, De re metallica, 1912/1950

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              are protected with long gloves, to prevent them from being injured by the
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              chips which fly away from the fragments.</s>
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              <s>In that district of Greater Germany which is called Westphalia and in
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              that district of Lower Germany which is named Eifel, the broken ore which
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              has been burned, is thrown by the workmen into a round area paved with the
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              hardest stones, and the fragments are pounded up with iron tools, which are
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              very much like hammers in shape and are used like threshing sledges. </s>
              <s>This
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              tool is a foot long, a palm wide, and a digit thick, and has an opening in the
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              middle just as hammers have, in which is fixed a wooden handle of no great
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              thickness, but up to three and a half feet long, in order that the workmen
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              can pound the ore with greater force by reason of its weight falling from a
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              greater height. </s>
              <s>They strike and pound with the broad side of the tool, in the
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              same way as corn is pounded out on a threshing floor with the threshing
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              sledges, although the latter are made of wood and are smooth and fixed to
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              poles. </s>
              <s>When the ore has been broken into small pieces, they sweep it
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              together with brooms and remove it to the works, where it is washed </s>
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              <s>A—AREA PAVED WITH STONES. B—BROKEN ORE. C—AREA COVERED WITH BROKEN ORE.
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              D—IRON TOOL. E—ITS HANDLE. F—BROOM. G—SHORT STRAKE. H—WOODEN HOE.</s>
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