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,
John Abel work available today as well as one of the best preserved examples of Laudian architecture. There is no record of Abel's work for another eighteen years, until in 1652, he was contracted to create a new building for which he was paid £30. 'The modell of ye New Building' still exists and is currently kept at Tyberton Court, where the work was originally done. Abel is also known to have built market houses in Brecnoc (1624), Kington and Lemster (1634). The Lemster (now Leominster) market house originally stood in Broad Street, but was rebuilt in 1855 by John Arkwright who