LEEUWENHOEK, ANTONY VAN. [Brieven seu Werkken] Ontledingen en Ontdekkingen van Levende Dierkens in de Teel-Deelen van Vercheide Dieren, Vogelen en Vischen; van het Hout met der Selver Meenigvuldige Vaaten; van Hair, Vlees, en Vis; Alsmede van de Groote Meenigte der Dierkens in de Excrementen... Leiden, [1694-] 1696-1718. 19 parts in 5 vols., 199 x 151 mm., contemporary vellum, covers somewhat bowed. FIRST COLLECTED EDITION, 3 engraved frontispieces, 89 engraved plates, and numerous engravings in text. Leeuwenhoeck was the pioneer microscopist, he took lenses utilized by drapers for examining cloth and imporved them to the degree of abtaining magnifications of 500, with a resolution power of one micron. See Dibner Heralds of Science 189; Grolier/Horblit 65.