BOOK X . 446 … A — Ampullae arranged in the vessels . B — An ampulla standing upright between iron rods . C — Ampullae placed in the sand which is contained in a box , the SPOUTS OF WHICH REACH FROM THE OPERCULA INTO AMPULLAE PLACED UNDER THEM . D — Ampullae likewise placed in sand which is contained in a box ,…
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![An illustration from Georgii Agricolae De re metallica : libri XII. Quibus officia, instrumenta, machinae, ac omnia deni[que] ad metallicam spectantia, non modo luculentissimè describuntur, sed & per effigies, suis locis infertas, adiunctis latinis, germanicis [que] appellationibus ita ob oculos ponuntur, ut clarius tradi non possint. ; Eiusdem De animantibus subterraneis liber, (1556)](https://img.insideoutlibrary.com/img/200/ia-gri_000033125008455038-272-186.webp)
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