Georgii Agricolae De re metallica libri XII : qvibvs officia, instrvmenta, machinae, ac omnia denique ad Metallicam spectantia, non modò luculentißimè describuntur, sed et per effigies, ... (1561)
bus panes in aſſerem triangu larem imponũt : ad eum bacilla ferrea ſunt affixa , ut diutius durare poſsit . Ei dem ſunt tres catenæ ferreæ ſuperius in annulo ferreo i ncluſæ . Operarij duo perticam , per eundem annulum penetrãtem humeris ſuſtinentes panemad fornacem , in qua argentum ſeparatur ab… … At è regione fornacum , in quibus æs cum plumbo miſcetur , & recremen ta recoquuntur , ad tertium murum lõgum ſint item fornaces decem , in 72
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