CHAUVIN, TIENNE. Lexicon rationale sive thesaurus philosophicus ordine alphabetico digestus. Rotterdam: Pieter vander Slaart, 1692. Engraved frontispiece by Adriaan Schoonebeek, engraved portrait of Chauvin, 30 folding engraved plates. Folio, contemporary Dutch blindstamped vellum, lower spine repaired, some other small defects, covers bowed; some minor marginal soiling to plates. FIRST EDITION. The Lexicon rationale is indicative of the marked shift toward rational and scientific thought that took place over the course of the seventeenth century. Thorndike VIII, pp. 299-301; Wellcome II, p. 333; Norman 463.