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)
quæ uaſa ſatis oſtendi : nunc machinas exponam , hæ triplices ſunt , tractoriæ ſcilicet , ſpiritales , ſcanſoriæ . Tractorijs onera ex puteis extrahuntur . Spiritales aerem conceptũ ex ore ſuo inflant in cuniculos uel puteos : quod ni fiat in nonnullis foſſores laborare ſine magna ſpirandi…
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