Sperry, Warren Myron, 1900- .

Hans Thacher Clarke studied chemistry at University College, London (1896-1905), worked for the Eastman Kodak Co. in Rochester (1914-1928), and was a professor of biological chemistry at the College of Physicians and Surgeons of Columbia University (1928-1956). Among other researches, he was involved in the production of penicillin in the U.S.

Hans Thacher Clarke (1887-1972) was born in Harrow, England. From 1896-1905, he attended University College London School, and went on to enter the University as a student of chemistry. There he studied under William Ramsey, J. N. Collie and Samuel Smiles. He also attended courses in physiological chemistry taught by R.H. A Plimmer and physiology with E. H. Starling, but found these studies boring at the time. After receiving his B.Sc. in 1908, Clarke continued to do research at University College under the direction of Smilesand A.W. Stewart. In 1911, he was awarded an 1851 Exhibition Scholarship which he used to spend three semesters with Emil Fischer in Berlin and one semester with A.W. Stewart at Queen's College, Belfast. On his return he was granted the D.Sc. from London University in 1913.

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