C. A. BALDUIN.

c. a. AURUM SUPERIUS et Inferius Auras Superioris Saiduin. £t inferioris Hermeticum. C. A. Balduini.
With two engraved folding plates. 12 mo., half calf by Zaehnsdorf Amstel., 1675. 25s.
The Philosopher's Gold, according to this author, is to be sought for through the "Universal Magnet," the "Salt of the World," which " draws gold from out of the air." He duly directs the student how and at what time this operation is to be performed.
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