MAY I please supplement the obituary notice in Nature of May 3 as follows : McSwiney, a Cork man, entered Trinity College, Dublin, in 1912, and I first met him when assigned to my section of a practical class for first-year medical students. He joined the O.T.C. and in September 1915 was commissioned as a Surgeon Sub-Lieutenant RJST.V.R., and served in H.M.S. Staunch. He graduated in 1916 and after wards completed his medical course and received the Sc.D. degree. In anatomy and physiology we were both grateful pupils of Prof. A. F. Dixon and Sir William Thompson. The latter was drowned when the Leinster was sunk in 1918. He was on his way back to his post as scientific adviser to the Ministry of Food in London. Thompson was a pioneer in the study of nutrition ; he and his assistant, Dr. Caldwell, fed themselves on a rigid diet for weeks on end, performed all necessary analyses and then varied the diet and noted the changes-this asceticism on top of arduous teaching work.