INDEX 



357 



Mules, reversion in, 70 

 Mutilations, alleged inheritance 

 of, 25 



Nageli, experiments on Alpine plants, 

 42 ; micellae, 57 



Narcotics, parallel with diseases, 206 



Natural Selection, alleged inadequacy 

 of, 92 ; difficulty of observing, 108 



Negroes ; evolution against malaria, 

 136 ; comparative immunity to 

 malaria, 136-7-8, 172 ; suscepti- 

 bility to tuberculosis, 147 ; not the 

 most susceptible race, 150 ; insus- 

 ceptibility to yellow fever, 175 ; 

 colonies in Europe, Asia, and 

 America, 141, 149, 184 ; mental 

 characteristics of, 300 



Nomadic tribes, spread of disease 

 among, 176, 177 



Nucleus, the bearer of heredity, 3 ; 

 equivalence in germ-cells, 3-4 



Opium, habituation to, 120 ; evolu- 

 tion against, 199 ; immunity to, 

 207 



Origin of Species, The, 1 



Osborn ; the unknown principle in 

 heredity, 91 



Oyster, memory in, 226 



Ozzard, Dr., on malaria in British 

 Guiana, 137 



Pallas, on domestication, 101 



Pangenesis, 8-9 



Panmixia, 18 



Pansy, progression and reversion in, 

 79 ; contributions of parents to, 96 



Parsimony, scientific principle of, 47 ; 

 of nature, 213, 223, 238, 243, 262, 

 294 



Parthenogenesis, variations occurring 

 in connection with, 49, 84 ; re- 

 gression, 84 



Parturition, regression in, 345 



Pasteur, on acquired immunity, 118 ; 

 on treatment of rabies, 121 ; 

 anthrax, 122 



Pearson, Prof. Karl, on the function 

 of sex, 47 ; on mid-parent, 48 ; on 

 infertility, 100 ; on mental charac- 

 ters, 286 



Peerage, British, 322 



Peile, Rev. James H. F., on educa- 

 tion, 321 



Phagocytes, 21 ; in disease, 116 ; in 

 tuberculosis, 145 



Pigeons, reversion in, 62, 72 ; pre- 

 potency in, 69 ; disease in, 160 



Pigs, cross-bred, 70-1 



Plague and pestilence, 177, 179, 182 



Play, of dogs, 227; of ants, 228; 

 instinct of, 241 



Pleasure and pain, function of, 215, 

 261 



Plumbism, 42 



Polyandry and polygamy, 276 



Poulton, on Natural Selection, 109 



Powis, Earl of, on cattle, 71 



Prepotency, of long-established races 

 and inbred stock, 48 ; of abnorm- 

 alities, 83 ; of ancient characters, 

 87 ; of mature parents and germ- 

 cells, 69 



Present, the specious, 232, 261 



Prisons, tuberculosis in, 141 



Prohibition, legislative, 341 



Quebec, battle of, 185 



Rabbits, prepotency in, 69; reversion 

 in cross-bred, 71 ; infected with 

 rabies, 121 



Rabies, 121, 123 



Reason, 220 ; definition of, 222 ; de- 

 pendent on memory, 235 ; as sub- 

 stitute for instinct, 237 



Recapitulation, a logical necessity, 

 53 



Receptacula seminis in pathogenetic 

 species, 84 



Reflex action, definition of, 214 ; 

 evolution of, 215; fundamental 

 difference from automatic action, 

 257 



Reformation, the, 309 



Regeneration, 29 



Regression, in absence of selection, 

 45 ; identical with reversion, 59 ; 

 in domesticated species, 77 ; in 

 plants, 90 ; in civilized man, 106 



Relapsing fever, immunity to, 117 



Religion, as educational factor, 295, 

 297, 301 ; the Pagan, 305 



Rentoul, Dr. R. R., on insanity, 350 



Reptiles, memory in, 226 



Reversion, in fowls, 62 ; in pigeons, 

 62 ; zebra hybrid, 70 ; mules, 70 ; 

 in pigs, 70 ; in cattle, 71 ; rabbits, 

 71 ; sheep, 71 ; mice, 74 



Richet, on consciousness and memory, 

 223 ; on the attention, 256 



Rochefoucauld, La, on love, 276 



Romanes, Prof. G. , on recapitulation, 

 56 ; on sterility, 100 ; on reason, 

 220 ; on memory, 224, 231 ; on 

 ants, 228 ; on mental evolution, 

 249, 266 ; on instinct, 251 



Ross, on malaria, 169 



Roulin, on mules, 70 



