Agricola, Georgius, De re metallica, 1912/1950

Table of figures

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              and hold it, lest it should fall out of the beam; that end is hardly a digit
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              thick, while the other round end is thicker than a digit. </s>
              <s>When the door is
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              to be shut, this pin lies under the timber and holds the door so that it cannot
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              fall; the pin likewise prevents the rectangular iron band which encircles the
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              end of the beam, and into which is inserted the ring of a long hook, from
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              falling from the end. </s>
              <s>The lowest link of an iron chain, which is six feet long,
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              is inserted in the ring of a staple driven into the right wall of the furnace,
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              and fixed firmly by filling in with molten lead. </s>
              <s>The hook suspended at the
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              top from the ring should be inserted in one of these lower links, when the
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              door is to be raised; when the door is to be let down, the hook is taken out
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              of that link and put into one of the upper links.</s>
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              <s>On the third day the master sets about the principal operation. </s>
              <s>First
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              he throws a basketful of charcoals on to the ground in front of the hearth,
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              and kindles them by adding live coals, and having thrown live coals on to the
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              cakes placed within, he spreads them equally all over with an iron shovel.
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              </s>
              <s>The blade of the shovel is three palms and a digit long, and three palms wide;
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              its iron handle is two palms long, and the wooden one ten feet long, so that
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              it can reach to the rear wall of the furnace. </s>
              <s>The exhausted liquation cakes
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              become incandescent in an hour and a half, if the copper was good and hard, </s>
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            <figure number="272"/>
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              <s>A—THE DOOR LET DOWN. B—BAR. C—EXHAUSTED LIQUATION CAKES. D—BRICKS.
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              E—TONGS.</s>
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