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De re metallica (1912)

Agricola, Georg, Hoover, Herbert · leaf 603

An illustration from De re metallica, 1912, leaf 603
BOOK XII . 559 … A — Nile . B — Nitrum - pits , such as I conjecture them to be . 7 verted into nitrum . Just as the sea , in flowing of its own will over the soil of this same Egypt , is changed into salt , so also the Nile , when it overflows in the dog days , is converted into nitrum when it flows into the…

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