[144] Nature, August, 29 1907.

[145] Ibid., March 7, 1907.

[146] Bulletin, Ast. Soc. de France, June, 1904.

[147] The Observatory, October, 1903, p. 392.

[148] Astronomy and Astrophysics, 1894, p. 277.

[149] Nature, November 18, 1897.

[150] Journal, B.A.A., January, 1907.

[151] Journal, B.A.A., February, 1909, p. 161.

[152] Cosmos, vol. ii. p. 703.

[153] Ibid.