INDEX 



Cattell, 108, 184, 185 



Cattle, short-horned, 342 



Causation, natural, 29 



Cell, study of, 19 



Central America, maize first grown in, 



326 

 Central Experimental Farm, 355 

 Chandler, A. C, 294 

 Chase, Stuart, 81 

 Chemistry, of body, 18 

 colloidal, 21 

 contributions of, to human welfare, 



249, 253 

 physical, 253 

 Cheney Brothers, use of psychological 



tests by, 138 

 Chesterton, G. K., 12, 195 

 China, 340 

 Chromatin, 170 

 Chromosome Theory of Heredity, 173, 



181 

 Chromosomes, behavior of, during 



sexual reproduction, 170 

 material basis of heredity, 20 

 mental heredity carried in, 85 

 sex, 182 

 Cock of India, 322 

 Cod liver oil, source of vitamin A, 366, 



367 

 source of vitamin D, 374, 375 

 Coenotropes, 99 

 Color-blindness, 169, 182 

 Comitatus, 38 

 Communism, 189 

 Complexes, 72 

 Compton, K. T., 4 

 Comte, 61 

 Conditioning, of mind, 14, 25, 86, 87, 



97, 98, 99 

 Connecticut Agricultural Experiment 



Station, 361 

 "Connecticut Yankee in King Arthur's 



Court, A," 319 

 "Conquest of Happiness, The," 315 



Contraception, contribution of endo- 

 crine zoology to, 303 



need of revision of laws regarding, 

 193 

 Conway, 79 

 Copernicus, 29 



Corn, importance of, to United States, 

 318, 321, 359 



introduction of into foreign coun- 

 tries, 326 



principal food of natives of America, 

 327 



story of crossed, 359jf. 

 Corn borer, methods of control, 306 

 Corpus luteum, function of, 301 

 Cortes, 320 



Cox, Catherine M., 190 

 Crawley, 79 



Cretinism, 118, 180, 300 

 Crime, 77, 78, 191 

 Crimea, 350 



"Criminal Psychology," 77 

 Crossbreds, inadvisability of use of, 

 for continued reproduction, 346 



outstanding features of, 347 

 Crossbreeding, importance of, 344, 345 



results of development of a system 

 of, 348 



use of, in Denmark, 345 

 Crossing-over, 172 

 Cultural change, causes of, 49, 52 

 Culture, definition of, 45 



future of, 52 



general scheme of, 47 

 Cytoplasm, 175 

 Czechoslovaks, rating of, 145 



Darrow, Clarence, 195 



Darwin, Charles, 21, 22, 29, 30, 35, 61, 



69, 195, 315 

 Darwinian principle, 312 

 Death rate, cut in half, 247 

 de Calcar, John, 17 



[387] 



