[29] Proceedings, IX (1897), 244.
[30] Phil. Mag., XXIX (1890; 5th series), 56.
[31] Ibid., p. 292; Nature, XXXVI, 412.
[32] Proc. Camb. Phil. Soc., IX (1897), 333.
[33] Ibid., p. 345.
[34] Phil. Mag., XLVI (1898), 528.
[35] Verh. der deutsch. phys. Ges., XVI (1914), 422.
[36] Phil. Mag., V (1903; 6th series), 354.
[37] Op. cit., p. 429.
[38] Phys. Rev., XXVI (1908), 198.