Agricola, Georgius
,
De re metallica
,
1912/1950
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a discourse on the finding of veins. </
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<
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>The third book deals with veins and
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stringers, and seams in the rocks. </
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<
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>The fourth book explains the method of
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delimiting veins, and also describes the functions of the mining officials.
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</
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<
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>The fifth book describes the digging of ore and the surveyor's art. </
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<
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>The
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sixth book describes the miners' tools and machines. </
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<
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>The seventh book is
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on the assaying of ore. </
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<
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>The eighth book lays down the rules for the work of
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roasting, crushing, and washing the ore. </
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<
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>The ninth book explains the
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methods of smelting ores. </
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<
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>The tenth book instructs those who are studious
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of the metallic arts in the work of separating silver from gold, and lead from
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gold and silver. </
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<
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>The eleventh book shows the way of separating silver from
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copper. </
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<
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>The twelfth book gives us rules for manufacturing salt, soda, alum,
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vitriol, sulphur, bitumen, and glass.</
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>Although I have not fulfilled the task which I have undertaken, on account
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of the great magnitude of the subject, I have, at all events, endeavoured to fulfil
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it, for I have devoted much labour and care, and have even gone to some
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expense upon it; for with regard to the veins, tools, vessels, sluices, machines,
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and furnaces, I have not only described them, but have also hired illustrators
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to delineate their forms, lest descriptions which are conveyed by words
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should either not be understood by men of our own times, or should cause
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difficulty to posterity, in the same way as to us difficulty is often caused by
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many names which the Ancients (because such words were familiar to all of
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them) have handed down to us without any explanation.</
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<
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>I have omitted all those things which I have not myself seen, or have </
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