[64] Popular Astronomy, vol. 11 (1903), p. 496.
[65] Kinetic Theories of Gravitation, Washington, 1877.
[66] The Observatory, June, 1894, p. 208.
[67] Nature, June 8, 1899.
[68] Astrophysical Journal, vol. 14 (1901), p. 238, footnote.
[69] Mars as the Abode of Life, p. 52.
[70] Second Book of the Maccabees v. 1-4 (Revised Edition).
[71] Humboldt’s Cosmos, vol. i. p. 169 (Otté’s translation).
[72] Quoted by Grant in History of Physical Astronomy, p. 71.
[73] Ibid., pp. 100, 101.