286 



Index 



tests with colored papers, 133-150; 

 tests with ray filters, 151-177; 

 orange-blue tests, 138; yellow-red 

 tests, 139; light blue-orange tests, 

 140; dark blue-red tests, 145; 

 green-light blue tests, 147; violet- 

 red tests, 148; green-blue tests, 

 158; green-red tests, 163; blue- 

 green tests, 170; blue-red tests, 

 173; structure of the retina, 177; 

 conclusions, 176; of different ani- 

 mals, 143. 



Comparative pedagogy, 239. 



Comparison, choice by, 131. 



Cones, lacking in eye of dancer, 177. 



Corti, organ of, in dancer, 54, 65. 



Cotton mouse, 8. 



Curves, of habit formation, 217, 231, 

 2 33> 2 35, 2 735 irregularities of , 232; 

 of labyrinth habit, 236; of dis- 

 crimination habit, 236; of learning 

 and re-learning, 257; of plasticity, 



273- 



Cyclostat, behavior of dancer in, 46. 



Cyon, E. de, dancer pathological, 

 ii ; behavior, 30, 41; behavior of 

 blinded dancers, 47; varieties of 

 dancer, 48-50, 56; space percep- 

 tion, 63, 67; individual differences, 

 69; anatomy of dancer, 70; hear- 

 ing of dancer, 74-81 ; pain cries, 75 . 



DANCERS, occurrence among com- 

 mon mice, 9; varieties of, 49, 277; 

 hybrid, 13. 



Dancing, 2, 5 ; forms of dance move- 

 ment, 32; whirling, circling, figure- 

 eights, manege movements, solo 

 dance, centre dance, 32-33; direc- 

 tion of, 33, 281; periods of, 34, 39; 

 amount of, 39; causes of, 31, 70; 

 sex differences in, 34; individual 

 differences in, 277, 278. 



Darbishire, A. D., breeding experi- 

 ments with dancers, 13. 



Deafness of dancer, 53, 61, 73 ; causes 

 of, 68, 71, 72. 



Descent, lines of, 90, 279. 

 Development of young dancer, 22-28. 

 Differences, individual, 50, 197, 199, 



215, 221, 234, 254, 264; age, 269, 



270; sex, 199, 221, 274. 

 Direction of movement, choice by, 



109. 



Direction of whirling, 33, 281. 

 Discrimination, visual, box, 92; of 



brightness, 95, 132; white-black 



and black- white, 103-109; of 



grays, 115; habits, 147; by odor, 



149; by form, 179; method, 227; 



habit defined, 147, 231. 

 Diseases of dancer, 16, 241, 271. 

 Dizziness, 42, 44-47, 63; visual, 45, 



46; rotational, 46. 

 Docility, 200, 264, 270. 

 Dog, albino, 32; training of, 228; 



fear of electric shock, 225. 



EAR, structure of, 53-71; structural 

 types, 56; model of, 58; of rabbit, 

 54; functions of, 61, 62-72; move- 

 ments of, 77. . 



Educability of dancer, 126, 199. 



Education, human, 199; methods 

 of, 239; of vision, 126. 



Efficiency of training, 239. 



Electric-box for visual tests, 92. 



Electric-labyrinth for habit experi- 

 ments, 187. 



Electric-shock as punishment for 

 mistakes, 82, 94, 100. 



Epidemic among dancers, 241, 271. 



Equilibration in dancer, 41-44, 62. 



Error curves, 231, 235; form of , 232. 



Error records versus time records, 

 217. 



Errors, in labyrinths, 184, 210, 211, 

 222; nature of, 223; types of, 222- 

 225 ; value of, 225 ; number of, 223. 



Even numbers to designate males, 3, 



102. 



Excitability of dancer, 31, 85. 

 Experience, value of, 199; influence 

 of, 262, 263. 



