BOOK XII . 575 … A — Caldron . B — Tank . C — Cross - bars . D — Ropes . E — Little stones . By the third method vitriol is made out of melanteria and sory . If the mines give an abundant supply of melanteria and sory , it is better to reject the chalcitis , and especially the mlsy , for from these the vitriol is…
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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_000033125008455038-242-158.webp)
