[73] Being the year in which this passage was written.
[74] Viz. that of the derivation of life from life alone, as opposed to Abiogenesis, or its production from lifeless matter.
[75] See Fragments of Science, "Spontaneous Generation," for a full account.
[76] March 18, 1863. Life and Letters, i. 352.
[77] April 30, 1870. Ibid. ii. 17.
[78] Critiques and Addresses, p. 238.
[79] Lay Sermons, p. 18.
[80] Evolution and the Origin of Life, 1874, p. 23.
[81] Encyclopaedia Britannica, "Biology."
[82] Fragments of Science. "Rev. James Martineau and Belfast Address."