[344] Histoire de l’Astronomie Moderne, vol. i. pp. 185-6.
[345] Humboldt’s Cosmos, vol. iii. p. 210 (Otté’s translation).
[346] Ibid., vol. iii. pp. 213-14.
[347] J. C. Duncan, Lick Observatory Bulletin, No. 151.
[348] Astrophysical Journal, vol. 17, p. 283.
[349] The Origin of the Stars, p. 143.
[350] Ibid., p. 135.
[351] Quoted by Ennis in The Origin of the Stars, p. 133.
[352] Astrophysical Journal, vol. 20 (1904), p. 357.
[353] Nature, March 8, 1906.