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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)

Agricola, Georg, Georg, Agricola · Froben · leaf 197

An illustration from 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, leaf 197
b ipſa bractea eſt : itaq ; is flatus ignem excitat . Quã ob rem hæc fornacula , quam metallici propter uſum ab expe riendo appellant , apud chymiſtas ex uento nomen inuenit : uerum bracteæ ferreæ pars , quæ è fornacula extat & eminet longa eſſe ſolet dodrantem , la ta palmum . In ea carbunculi… … Ferrea autem fornacula conſtat ex quatuor bacillis ferreis , altis ſeſquipe dem , inferius parumper diuaricatis & latis ut firmius ſtare poſsint : ex quo rum duobus prior fornaculæ pars , ex duobus poſterior efficitur : cum iſtis bacillis utriuſque partis conglutinata & conferruminata ſunt bacilla…

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