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Extra info for De Re Metallica: Translated from the First Latin Edition of 1556 ... by Herbert Clark Hoover and Lou Henry Hoover
De La Pirotechnia 1540). "Hermolaus Barbarus, according to Watt (Bibliotheca Britannica, London, 1824), was a lecturer on Philosophy in Padua. , with commentaries on the older authors. 12 The debt which humanity does owe to these self-styled philosophers must not be overlooked, for the science of Chemistry comes from three sources Alchemy, Medicine and However polluted the former of these may be, still the vast advance which it Metallurgy. made by the discovery of the principal acids, alkalis, and the more common of their salts, should be constantly recognized.
But although it may be due to the carelessness of the writers that they have not transmitted to us the names of the masters who acquired great wealth through this occupation, certainly it is clear that do not understand their precepts or, if they do understand them, do not follow them for if they do comprehend them, seeing that these disciples have been and are so numerous, they would have by to-day filled their disciples either ; give anything but the most casual notes as to the personages here mentioned and their Aside from the classics and religious works, the libraries of the Middle Ages teemed writings.
12 Xenophon. , 5. BOOK I. 7 mankind, but on the contrary, like a beneficent and kindly mother she yields in large abundance from her bounty and brings into the light of day the The minerals on the herbs, vegetables, grains, and fruits, and the trees. other hand she buries far beneath in the depth of the ground; therefore, But they are dug out by wicked men who, as they should not be sought. " Ovid censures their audacity in the following lines " And not only was the rich soil required to furnish corn and due sustenance, but men even descended into the entrails of the earth, and : they dug up riches, those incentives to vice, which the earth had hidden Then destructive iron came and had removed to the Stygian shades.