Sir John Sealy Edward Townsend was a British physicist who conducted various studies concerning the electrical conduction of gases and directly measured the electric charge of the electron. He served as the first Wykeham Professor of Physics at the University of Oxford from 1900 until 1941.
- Occupation
- physicist, university teacher
- Citizenship
- United Kingdom
- Born
- June 7, 1868
- Died
- February 16, 1957
