[63] The Nebular Hypothesis itself is, of course, far from being an established certainty, and is not devoid of grave difficulties. Into these, however, it is not necessary now to enter.
[64] Apud Gaynor, The New Materialism, p. 83.
[65] Encyclopaedia Britannica, "Biology."
[66] Apud Gaynor, p. 84.
[67] Professor Marsh.
[68] Professor Dewar at Belfast, 1902.
[69] Recent Advances in Physical Science, 3rd Edition, p. 6.
[70] Gaynor, p. 102.
[71] Lay Sermons, p. 18.
[72] Critiques and Addresses, p. 305.