[9] Scientific Transactions of the Royal Dublin Society, IV (1891; 11th series), 563.

[10] See particularly Rutherford’s presidential address at the recent Liverpool meeting of the British Association, Science, LVIII (1923), 213.

[11] J. J. Thomson and E. Rutherford, Phil. Mag., XLII (1896), 392.

[12] Phil. Mag., XLIV (1898), 422.

[13] Proc. Camb. Phil. Soc., IX, 401.

[14] Phil. Trans., A 195, p. 193.

[15] Annale de Chimie et de Physique, XXVIII, 289.

[16] Phil. Trans., A 193, p. 129.

[17] Leonard B. Loeb, Proc. Nat. Acad., II (1916), 345, and Phys. Rev., 1917.

[18] Wellish, Amer. Jour. of Science, XXXIX (1915), 583.