1910 · Braunschweig:
PROVENANCE: Dr. Heinrich Jakob Bechhold (1866-1937), of Frankfurt am Main, was a German chemist, known for his work on colloid chemistry in medicine, member of the Royal Institute for Experimental Therapeutics in Frankfurt am Main, and editor of DIE UMSCHAU, a review of science, technology, literature, & art, joint author of Die Kolloide in Biologie und Medizin, Dresden, 1912 and translated for the US as Colloids in Biology and Medicine, New York, 1919. He was also responsible for Bechhold's handlexikon der naturwissenschaften und medizin, 1894. During WWI he made several vaccines against cholera and typhoid. From 1916 he taught medical physical chemistry at Frankfurt University. Because he was Jewish the German Reich revoked his teaching license in 1935. In 1937 he committed suicide.
Otto Lehmann (1855-1922) was a German physicist and "father" of liquid crystal as well as a devoted microscopist. Otto was the son of Franz Xavier Lehmann, a mathematics teacher in the Baden-Wurtemberg school system, with a strong interest in microscopes. Otto learned to experiment and keep records of his findings. Between 1872 and 1877, Lehmann studied natural sciences at the University of Strasbourg and obtained the Ph.D. under crystallographer Paul Groth. Otto used polarizers in a microscope so that he might watch for birefringence appearing in the process of crystallization.
DSB, VIII, pp. 148-149, by John G. Burke; David J.R. Cristaldi, Salvatore Pennisi, Francesco Pulvirenti, Liquid Crystal Display Drivers: Techniques and Circuits, p. 2. (Inventory #: S13113)