LIFE 371 



Pedigree of Man and Other Essays, London, 1883). — Freie Wissenschaft 



und freie Lehre. Stuttgart, 1878. (Freedom of Science and Teaching, 



with Note by Huxley. London, 1879.) 

 Huxley, T. H. — On our Knowledge of the Causes] of the Phenomena of 



Organic Nature. London, 1863.^ Lay Sermons, Addresses, and 



Reviews. (On the Physical Basis of Life, pp. 132-61.) London, 1870. 



— Nineteenth Century, vol. xxiii. (The Struggle for Existence.) 

 Sanderson, J. S. Burdon. — Opening Address to the British Association, 



1889, Nature, vol. xl. p. 521. 

 Spencer, H. — Principles of Biology, vol. i. (to be read with caution). 



London, 1864. The Man versus the State, London, 1890. 

 See also the articles in The Encyclopaedia Britannica on "Biology," 

 "Physiology" (Part I., General View), and "Protoplasm," and those in 

 the new edition of Chambers's Encyclopsedia on "Abiogenesis," "Biogenesis," 

 and " Development." 



Readers interested in tracing the origin of moral feeling from purely 

 animal instincts may read the present writer's essay on " Kindred Group- 

 Marriage " in The Chances of Death and other Studies in Evolution, vol. ii. 



