[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.