[224] Ibid., p. 248.
[225] Ibid., p. 250.
[226] Ibid., p. 231.
[227] Vol. iii. p. 106.
[228] Grant’s History of Physical Astronomy, p. 298.
[229] Ibid., p. 305.
[230] Humboldt’s Cosmos, vol. i. p. 95.
[231] Nature, April 30, 1908.
[232] Bulletin, Ast. Soc. de France, May, 1906.
[233] Nature, November 24, 1904.