John Jacob Abel the position of chair of the department until he retired at the age of 75 in 1932. Ever since his early years in Europe, Abel showed great interest in isolating pure form of internal gland hormones. The first work that led to his international reputation as a pharmacologist and biochemist was the isolation of epinephrine from adrenal medulla. However, he was only able to isolate a monobenzoyl derivative of epinephrine. While he was improving his processes on decomposing the benzoyl derivative to obtain salts of epinephrine using saponification, a Japanese chemist J. Takamine, who had visited his lab, was able
Jacob Tonson Street. It has been said that when Tonson bought the copy of "Troilus and Cressida" (1679), the first play of John Dryden's that he published, he was obliged to borrow the purchase money (£20) from Abel Swalle, another bookseller. The names of both booksellers appear on the title-page, as was often the case at that time. Tonson was sufficiently well off to purchase plays by Otway and Nahum Tate. In 1681 the brothers Richard and Jacob joined in publishing Dryden's "Spanish Friar", and in 1683 Jacob obtained a valuable property by purchasing from Barbazon Ailmer, the assignee of Samuel Simmons,