John Jacob Abel to successfully isolate the neutral base of epinephrine by adding ammonium to highly concentrated extract, a method Abel himself tried but failed due to the use of low concentration of extract. After Takamine's success, Abel himself remarked, with great candor, "The efforts of years on my part in this once mysterious field of suprarenal, medullary biochemistry, marred by blunders as they were, eventuated, then, in the isolation of the hormone not in the form of the free base but in that of its monobenzoyl derivative." Together with L.G. Rowntree and B.B. Turner, Abel devised what they called a "vividiffusion" apparatus,
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,