Senior instructs Adolphus at the foot of the Tree of Metals. At corners of lower triangle are symbols of the alchemical tria prima, Sulphur, Mercury and Salt. From Occulus philosophia .. Frankfurt, 1613.

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Senior instructs Adolphus at the foot of the Tree of Metals. At corners of lower triangle are symbols of the alchemical tria prima, Sulphur, Mercury and Salt. From Occulus philosophia .. Frankfurt, 1613.

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Keywords: .., 1613., adolphus, alchemical, alchemy, archival, archive, chemistry, corners, foot, frankfurt, historical, history, instructs, mercury, metals., occulus, philosophia, prima, salt., science, senior, sulphur, symbols, tree, tria, triangle