Mutus liber, in quo tamen ..., engraving, Library of Congress

Angels descending Jacob's ladder blowing trumpets with sleeping Jacob below. Part of a series supposedly depicting the preparation of the alchemist's philosopher's stone.
Frontispiece in: Biblioteca chemica curiosa / Jean Jacques Manget. Genevae : Sumpt. Chouet, D. De Tournes, Cramer, Parachon, Ritter, & S. De Tournes, 1702.
Published in: The tradition of science / Leonard C. Bruno. Washington, D.C. : Library of Congress, 1987, p. 176.