Note 1a — The Physical Kinship
Reading edition
1b. Darwin: Descent of Man, 2nd edit.; London, 1874. 2. Huxley: Man’s Place in Nature; New York, 1883. 3a. 3b. Thompson: Outlines of Zoology, 3rd edit.; Edinburgh, 1899. 4. Drummond: Ascent of Man; New York, 1894. 5. See table of geological ages, at the end of the chapter. 6. Haeckel: The Riddle of the Universe; New York, 1901. 7. Huxley: On the Origin of Species, lecture iv.