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Samuel Shrowder Pickles (born April 15, 1878, Rochdale, Eng.—died Feb. 11, 1962, Bradford-on-Avon?) was an English chemist who proposed a chain (actually, very large ring) structure for rubber. After receiving a bachelor’s degree in chemistry in 1903 from Owens College, Manchester, Pickles worked there on terpenes with William Henry Perkin, Jr. He received a doctorate (1908) from the Imperial Institute, London, for a study of rubber and vegetable fats and oils. The German chemist Carl...