896 Index. 



Herschel, Sir John, his theory of the luminous sun-spots, 65; of the form of 

 the universe, 07-68. 



Holbrook, Dr. Martin L., on vegetal evolution, 135. 



Homology, in animal evolution, 291-292. 



Hooker, Dr., on Herbert Spencer, 9 ; his relation to Darwin's Origin of Spe- 

 cies, 30. 



Horse, the evolution of, 38, 08-100, 292. 



Humboldt, William von, his political philosophy compared with Herbert 

 Spencer's, 14. 



Hume, David, 343. 



Huxley, Prof. Thomas H., his defence of Darwin, 40; on the influence of the 

 Origin of Species, 42; on Darwin's honesty, 44-45; on the proof of bio- 

 logical evolution, 100; on organic and inorganic substance, 118; on 

 micro-organisms, 110 ; on bathybius, 110; evolution no longer an hypoth- 

 esis, 304 ; on mind and matter, 350, 366. 



Igneous Rocks, the formation of, 93. 



Immortality, evolution's word concerning, 334-336, 338. 



Industrial evolution, 374-375. 



Infertility of species, 149, 151-153, 155. 



Intuitional philosophy, 340. 



Island life, illustrative of evolution, 08, 156, 301-302. 



James, Prof. William, on mental evolution, 185. 



Janes, Dr. Lewis G-., on the philosophical aspects of cosmic evolution, 74; on 

 the evolution of the earth, 70-103 ; on the laws of organic and inorganic 

 growth, 136; on the law of population, 172; on mental evolution, 107; on 

 Spencer's theory of government, 230 ; on the personality of the Absolute, 

 253 ; on the evolution of morals, 257-280, 283-284, 310-336 ; 6n Spencer's " Un- 

 knowable," 330-340; on the philosophy of evolution, 365. 



Japan, evolution in, 50. 



Judaism, as related to evolution, 244-245, 252 ; as related to Christianity, 246, 

 330-340. 



Kant, Emanuel, his conception of the ding an sich, 182; on the moral law, 

 265; on good and evil, 273; on the will, 277; the evolution-philosophy not 

 derived from him, 343; his Critique of Pure Reason, 343, 346. 



Kennan, George, his testimony as to Spencer's writings in Siberia, 6. 



Krakatoa, the volcano of, 94. 



Lamarck, anticipated by Dr. Erasmus Darwin, 26 ; his advocacy of evolution, 

 32; his theory of use as affecting development, 149-150, 155; importance of 

 his hypothesis, 164; its correctness, 165; its revival by Prof . Cope, 174; a 

 forerunner of the evolution philosophy, 343. 



Language, its brain-convolution found in anthropoid apes, 162 ; evidences that 

 primitive man was deficient in speech, 164; its evolution, 262, 264, 363; it 

 differentiates man from the lower animals, 262, 312 ; the connecting link 

 between mind and matter, 363-364. 



Laplace, his theory of solar and planetary evolution, 56-60; rejected in part 

 by Faye, 62 ; the theory not wholly satisfactory, 71 ; objections to it, 73 ; a 

 forerunner of evolution, 343. 



Law of conduct, as formulated by the evolution philosophy, 272. 



Laws, natural and divine, 133. 



Laws of evolution, 141, et seq. 



Le Conte, Prof. Joseph, on the subsidence of the earth's crust, 03; on geolog- 

 ical evolution 05-96 ; on the effect of astronomical and geological studies, 

 102-103 ; on spontaneous generation, 14o ; his definition of evolution, 141 ; 

 his formulation of its laws, 141 ; his judgment of Romanes' theory, 151 ; on 

 the influence of natural and sexual selection, 290; on artificial and natural 

 selection, 306 ; on spirit immortality, 336. 



Leibniz, his doctrine of pre-existence, 275. 



Lewes, George Henry, on the spinal cord as a seat of consciousness, 103 ; on 

 the interdependence of organic and mental forces, 363. 



Linnreus, Darwin's acquaintance with his system, 26 ; his basis of classifica- 

 tion, 36. 



Locke, John, 343. 



Looking Backward, 371-372, 388. 



Lotze, Herman, his doctrine of pre -existence, 275. 



Loves of the Plants, 26. 



Lubbock, Sir John, on the intelligence' of the ant, 172 ; on ancestor-worship, 235. 



Lyell, Sir Charles, compared with Darwin, 29; his doctrine of continuity, 30; 

 his relation to the Origin of Species, 30 ; his endorsement of Darwin, 40 ; 



