... shall take 10, 12, or 15 pound of Saturn, wherein is no mixture of any other Metal; laminate it thin, have in readiness a great Stone Jugg, half full of Vinegar, stop the Jugg very close, set it in a Lukewarm Bath, every three or four days scrape off the calcin'd Saturn from the Plates, and reserve it apart, thus do so long till you have 5 or 6 l. ... — Of Natural and Supernatural Things • Basilius Valentinus
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