INDEX 



Adaptability, necessity for, in the 



straggle for existence, 484, 436 

 Adaptation, the result of natural 

 selection, 9 

 and variation, relation between, 



56 

 no antithesis between constancy 



and, 103 

 as illustrated by case of deep- 

 sea fishes, 148 

 and variations of the species, 



322 

 tendency of social evolution to 



affect, 426 

 need for, calls forth variations, 



434 

 of the species, brought about 



by amphimixis, 435 

 to enviromnent, a fundamental 



law of Nature, 540 

 all phenomenon must conform 

 to the law of, 545 

 Adulteration of alcoholic drinks, 



277 

 Aims of Natinre and evolution, 540, 



541 

 Alcoholism, transmission of, 69 

 influence of, on teratological 



heredity, 170 

 a direct cause of the increase of 



insanity, 271, 276, 279 

 the result of social conditions, 

 276 

 Alcohol, statistics of the consump- 

 tion of, 275 

 comparison of consumption in 



different countries, 276 

 expenditure on, 416, 417 

 Algae, 11, 13 



asexual reproduction of, 24 

 Altruism, tendency towards a mis- 

 taken, 386 



Altruism, a. false conception of, 

 responsible for humanitarianism, 

 403 

 Altruistic tendency, modern, shows 



mistaken results, 468 

 Amixis and variation, 146 

 Ammon, and sociological ques- 

 tions, 2 



and the variation limit of 



height, 100 

 a representative of the anthro- 

 po-sociological school, 198 

 AmcBba, to man, a progression of 

 organic types, 9 

 share of, in constitution of 

 human germ-plasm, 157 

 Amoralism, the result of Western 

 civilisation, 239 

 an effect of individualism, 245, 



250 

 the cause of increase of suicide, 

 250 

 Amphimixis, 18, 21, 23 



indispensable to reproduction 



of certain species, 24, 25 

 as affectiug variations, 45 

 part played by, in germinal 



selection, 50 

 constitutes a danger to specific 



talents, 61 

 nature of, 97 



checks useless variations, 99 

 adapts species to environing 

 conditions, 100, 103, 105, 106 

 maintains biological average of 



species, 101, 103, 106 

 remedies defects in either of 

 the parental individuals, 104 

 as a rejuvenating factor, 113 

 favours variations, 159 

 Anarchism, the counterpart of 

 Socialism, 474 



557 



