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Estimate: $ 500 - $ 750
TULP, NICOLAAS. Observationes medicae. 15 engraved illustrations, all but one full page. [16], 279 pages, including blank *8. 8vo, 152x93 mm, 18th-century 1/2 sheep; blank irregular horizontal strip torn across title and restored, marginal dampstaining through second half of volume. Amsterdam: apud Ludovicum Elzevirium, 1641
first edition of a collection of case histories ending with the description of an "orang-outang," actually an Angolan ape, the first brought live to Europe. "Tulp . . . made numerous contributions to anatomy and pathology in this work, including his description of the ileocecal valve ('Tulp's valve'), whose discovery he shared with Gaspard Bauhin"--Norman. 2114. Garrison-Morton 3737; Krivatsy 12007; Willems 980.
