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Title: Tractatus duo medico-physici, unus de liene, alter de generatione Author: Velthuysen, Lambert van Place: Trajecti ad Rhenum (i.e., Utrecht) Publisher: Typis Theodori ab Ackersdijck, & Gisberti à Zyll Date: 1657 Description: [56], 162; 286, [1 errata] pp. (12mo) early half vellum and boards, spine lettered in an early hand. First Edition. Velthuysen, philosopher, theologian, and physician, postulated a theory of menstruation that cited “a fermenting menses-inducing force derived from the 'semen-like' fluid which comes from the female testes into the blood circulation.” He was also an early proponent of Harvey's theory of circulation and a correspondent of Spinoza's. Krivatsy 12247. Heirs of Hippocrates 548. Hirsch V, 723. Not in the RCOG catalogue. With the bookplate of Adolf Reichard and the signature of Samuel Amberg. Lot Amendments Condition: Spine leaning, light wear to binding; very good. Item number: 276404