J. J. Thomson, Phil. Mag. 47, p. 253, 1899; Conduction of Electricity through Gases, p. 73, 1903.

Rutherford, Phil. Mag. Jan. 1899.

Townsend, Phil. Mag. Feb. 1901.

Rutherford, Phil. Mag. Nov. 1897, p. 144, Jan. 1899.

Townsend, Phil. Trans. A, p. 157, 1899.

McClung, Phil. Mag. March, 1902.

Langevin, Thèse présentée à la Faculté des Sciences, p. 151, Paris, 1902.

Owens, Phil. Mag. Oct. 1899.

Rutherford, Phil. Mag. p. 429, Nov. 1897.

Zeleny, Phil. Trans. A, p. 193, 1901.

Langevin, C. R. 134, p. 646, 1902.

Zeleny, Phil. Mag. July, 1898.

Rutherford, Phil. Mag. Feb. 1899.

Zeleny, Phil. Trans. 195, p. 193, 1900.

Langevin, C. R. 134, p. 646, 1902, and Thesis, p. 191, 1902.