6o6 



INDEX 



Cells, as vital units, 187-204 



behave like individuals in a com- 

 munity, 188-192 



built like engines, 193-196 



contrasted with protozoa, 196 



cultivated outside the body, 2 1 0-2 1 6 



dependence of activity upon envi- 

 ronment, 21 1 



developed from pre-existing cells, 

 198 



electrical forces in, 194 



environment within the body, 219 



influenced by nutritional changes, 

 213 



inorganic composition of, 47 . 



microscopic structure 192 



origin of, 35-43 



relation to one another, 205-217 

 Cells, response to growth promoting 

 factors, 212 



size and shape, 187 



unlimited growth of, 211 

 Cellular basis of inheritance, 199-201 

 Cephalic index, 163 

 Cerebellum, 256 

 Chicago, crimes in, 385 

 Chinese, see yellow-brown races 

 Christian world, 468 

 Christianity and monogamy, 269-271 

 Christians, number of, 520 

 Chromosomes, 201 

 Chronic arthritis, 446 

 Circulation, diagram of, 221 

 Cities, life in, 348-378 



atmosphere, 359-366 



comparative death rates, 351-356 



conclusions, 377 



expectation of life, 356-359 



foods, 369-371 



insects, 372 



light, 371 



municipal sanitation, 349-35 1 



personal contact, 372-377 



water supplies, 366-368 

 Civilization, and education, 475-477 

 Climate, effects of, 295-330, 340-342 



factors in, 295 

 Color, of eyes, 161 



of hair, 161 



of skin, 160 

 Comets, 10 



Communal bonds, 143 

 Communistic reform in relation to 



marriage, 284 

 Companionate marriage, 281 

 Constitution, 498 

 Contract marriage, 281 

 Conversation, influence of, viii 

 Country life and city life compared, 



348-378 

 Cousins, marriage of, 283 

 Crime, 379-404 



and emotional life, 399 



and ideational life, 401 



and methodological contributions, 

 402 



criminality and abnormality, 393- 



399 



heredity, 400 



law versus science, 389-391 



national comparisons, 386-389 



scientific study, 384 



size and cost of crime, 385, 568 



theories, 382-383 

 Cytology, science of, 202-204, 216 

 Cytoplasm, 192 



Dead cells replaced by living ones, 



189 

 Death rate, and climate, 306-310 



comparative (urban and rural), 

 35 1 -356 _ 



reduced with fall of temperature, 



317 

 Decerebrate animal, 254 



Defectives and delinquents, cost of, 584 

 Deficiency diseases, 342-346 



thyroid enlargement, 346 

 Degeneration of race, 1 81-183 

 Delinquency, see crime 

 Dewey, contribution of, 596 

 Diarrhea of infants, 361 

 Diet, 331-347 



and fertility, 336-343 

 Digestion, intracellular replaced by 



extra-cellular, 413 

 Diseases, acute rheumatism, 446 



adjustment to infectious, 406-427 



chronic arthritis, 446 



deficiency, 342-346 



definition of, 492 



diarrhea of infants, 361 



enteritis of infants, 361 



inheritance of, 491-514 



