44
Abraham, Phys. Zeit. 4, No. 1 b, p. 57, 1902.
45
A full account of the path described by a moving ion under various conditions is given by J. J. Thomson, Conduction of Electricity in Gases (Camb. Univ. Press, 1903), pp. 79–90.
46
J. J. Thomson, Phil. Mag. p. 293, 1897.
47
Lenard, Annal. d. Phys. 64, p. 279, 1898.
48
Kaufmann, Annal. d. Phys. 61, p. 544; 62, p. 596, 1897; 65, p. 431, 1898.
49
Simon, Annal. d. Phys. 69, p. 589, 1899.
50
A complete discussion of the various methods employed to measure the velocity and mass of electrons and also of the theory on which they are based will be found in J. J. Thomson’s Conduction of Electricity through Gases.