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 The house design differs significantly from his later work in that it was built partially of stone. The stone window and ceiling beams of the house still survive, though the rest of the building was demolished. In March 1633, it is known that Abel was contracted again, this time by John, 1st Viscount Scudamore, to renovate Abbey Dore Church, a former Cistercian monastery in Herefordshire. The work was completed in March 1634, in time for the reconsecration of the building. Though there have been some minor alterations made to his work, the church remains the most intact example of Abel's