an pyrites , in which there is gold , sulphur , and vitriol , after the last particle of vitriol has been obtained by heating it in water , is thrown into a furnace , in which logs are placed . This furnace is very similar to an oven in shape , in order that when the ore is roasted the valuable… … A — Burning pyre which is composed of lead ore with wood placed above it . B — Workman throwing ore into another area . C — Oven - shaped furnace . D — Openings through which the smoke escapes . If pyrites or cadmia , or any other ore containing metal , possesses a good deal of sulphur or bitumen ,…
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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_000033125008455038-235-152.webp)
