Motion of electrons in gases; being an address given at the centenary celebration of the Franklin institute in Philadelphia, September, 1924, by John S. E. Townsend. Townsend, John, Sir, 1868-1957. Electrons. Electric discharges through gases. QC711 .T6 19 539.7211 TOE Oxford, At the Clarendon press, 1925. 1925. 1925 Text 166 p. : eng