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De re metallica (1912)

Agricola, Georg, Hoover, Herbert · leaf 618

An illustration from De re metallica, 1912, leaf 618
BOOK XII . 574 … A — Tunnel . B — Bucket . C — Pit . In hot regions or in summer , it is poured into out - of - door pits which have been dug to a certain depth , or else it is extracted from shafts by pumps and poured into launders , through which it flows into the pits , where it is condensed by the heat of the…

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