3i6 Index ^ 



PAGE 



Instinct, guides the young of those species that are not to 

 have parental care, and develops, or changes, as 



the condition of animal changes 169 



a law for the animal 170, 174, 207-208 



its uniformity among animals 171, 172 



influence of experience on 173 



is not infallible 175 



varies, to secure a given relation of the animal to the 



world 176 



leading to an act essential to life, is sometimes 

 linked to the senses. Examples — fly, young bird, 



hen 176, 177 



variations of 177, iSi, 182 



qualities of I79 



change of, in strength and quality, with correspond- 

 ing change of structure — examples 182 



modified, in consequence of abnormal conditions. . . 1S3 



no indications of any new 184 



what the general term includes 185 



given to animals according to their need, rather than 



rank 1S5 



instinct begins the act — Intelligence may carry it on 186 

 activities included in the general term — the sole guide 



of many lower tribes 187 



proper, has no stupidity 201 



one may control another 207 



is it the same in man as in animals ? 20S-213 



the animal in man difficult of separation from his 



highest instincts 215, 216 



control of, by man 221 



in man, is it separate from desires ? 222-224 



sphere of — its true nature learned, by knowing what 



powers men and animals have in common 226 



comparison of it, in men and animals 226 



products of 227 



Impulse, knowledge, skill, all involved in the mani- 

 festations of activities called 227, 22S 



difiference between, and intuitions 230, 231 



