LEHMANN, Otto (1855-1922). Molekularphysik mit Besonderer Berucksichtigung Mikroskopischer Untersuchungen.

LEHMANN, Otto (1855-1922).  Molekularphysik mit Besonderer Berücksichtigung Mikroskopischer Untersuchungen und Anleitung zu Solchen sowie einem Anhang über Mikroskopische Analyse. Leipzig: Verlag von Wilhelm Engelmann, 1888-89. 2 volumes, large 8vo (227 x 155mm). 10 lithographed plates, of which 7 printed in colours, illustrations and diagrams. Contemporary half roan and marbled boards, spines gilt (extremities rubbed). Provenance: “SDL Bücherei” (stamps on front free endpapers); from the Collection of Peter and Margarethe Braune. FIRST EDITION of the author’s first major work. “Lehmann discovered liquid crystals … [His] early scientific interest and experimentation were concerned with electric discharges in rarified gases, but he soon turned his attention to the study of the fine structure of matter as revealed under the microscope. His first major work describing his studies was ‘Molekularphysik’ …” (DSB). Poggendorff III, 792. (2)