E. Leon Chaffee - Vice President of the Institute, 1922

A brief biography of E. Leon Chaffee is presented. His research work in the field of electric oscillations and vacuum tubes has resulted in the publication of many papers in the PROCEEDINGS and other periodicals. For six or seven years he has continued research on the eye in which the potentials produced by the nerves in the retina when stimulated by light were recorded by an amplifier system. In collaboration with Miss Charlotte Perry he has just completed an accurate direct determination of the physical constant e/m (ratio of the charge to the mass of an electron). He has carried on a consulting practice and has given expert testimony in patent suits. Dr. Chaffee is a Fellow of the American Academy of Arts and Sciences and of the American Physical Society, a Member of the American Association for the Advancement of Science, the Optical Society, Executive Committee of the International Scientific Radio Union, and Chairman of the Committee on Radio Physics of the International Union. He became a Member of the Institute in 1917 transferring to the grade of Fellow in 1921. He is a member of the Committee on Standardization and the Technical Committee on Vacuum Tubes.