[324] Ibid., March 19, 1908.

[325] Popular Astronomy, vol. 15 (1907), p. 9.

[326] Astrophysical Journal, June, 1907, p. 330.

[327] Ibid., vol. 22, p. 172.

[328] Nature, November 18, 1886.

[329] Astrophysical Journal, vol. 17 (1903), p. 282.

[330] Astrophysical Journal, vol. 12 (1900), p. 54.

[331] Nature, March 21, 1878.

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

[333] Journal, B.A.A., vol. 17 (1903), p. 282.