Philosophy, human, origin of, Punnett, R. C., 215
Physical characters, determined
by environment, 33
Physical effects of temperature,
Physical environment, change of,
Physical world, influences of, on man, 28
Physiological effects of tempera- ture, 35
Plants, benefit of, to man, 53; chemical elements in, 52; dangers of careless discrimi- nation between, 83; flowering, 118; imported, and native of U. S., 113; leguminous, 13; mechanical effects produced by, 51; origin of cultivated, 112; perfected by crossing, 114; protection of, 53
Ploss, H., 323, 327-328 Pneumonia, 141 Polydactylism, 236 Population, contrasted in vari- ous states, 29; density of world's, 28; influences of so- ciety on, 33 Primates, 184
Primitive man, discoveries of, 186; variation from present man, 188
Rabbit, in Australia and New Zealand, 91
Race, crossing of: arguments for and against, 294, 302; conclu- sions, 301, 302; discussed, 294; in Africa, 298-299; in Europe, 285, 287, 293; in gen- eral, 299; Japanese and Eu- ropeans, 300-301; lowers birth rate, 296, 297; Mulatto in Civil War, 297-298
Race, human, classification of: Blumenbach, 304; on color basis, 280; distribution, 28; Giddings, 306-309; Huxley, 305; Johnston, 277-279; Lin- næus, 303; Mueller, F., 305; St. Hilaire, 305 Race, meaning of term, 278 Race differences: of body, 281- 282; color, 279-280; cubic contents, 289-290; facial an- gles, 289; hair, shape and distribution, 281; resistance to disease, 290-291; skull, 282; stature, 281
Race superiority or inferiority: Ammon's claim for the Ger- mans, 284-285; claims of superiority of long heads,
285-286; conclusion, 291-293; | Seasons, influence of, on social lack of final evidence, 300
Radical, the, 370
Radium, discovery of, 3, 141;
phenomena, 38 Segregation, of "unfit," 267
Selection, artificial, natural, sex-
ual, 178; evidences for, 180
Rainfall, 18; influence on plant | Semper, K., 28
Rays, alpha, 4; beta, 4; gamma, 5 Red clover, 60
Reformatory, inmates of the,
Regression, law of, 228 Reibmayr, A., 271, 347, 384 Reich, E., 383-384 Reid, G. A., 344-345 Religious fanaticism, influence
on society, 346 Reproduction: cell division, 194; cell specialization, 192; germ and body cells, contrast, 195; growth, 192; rate of, 70; sex differences, 196; stationary total, 71
Research, methods of, 148, 191 Rhythm of nature, 47 Ripley, W. Z., 280, 283, 285,
Semple, E. T., 31, 32, 102, 103 Sex, determination of, 207 Sex, human, differences: advent physical maturity, 323; ath- letic records, 318; beginnings of, 312; blood composition, 321; bodily proportions, 318- 319, 323; brain weights, 320- 321; differences do not indi- cate superiority, 329; growth of boys and girls, 316-317; influence on daily life, 326; influence of menstruation, 323- 326; males and females in U. S., 314; psychic phenomena, 326; resistance to shock, 322; secondary sexual characters, 315; sex ratios, 313; stature, weight, 317-318; two theories as to rôle of women, 329-330; variability, 327-328
Rockefeller Institute for Medical Sex-linked characters, 209
on, 339; permanency of, 387; | Synthetic chemistry, 110 progress of, through surgical skill and medical knowledge, 343; religion and, 339; Spen- cer's idea of, 378
Society tests: choice of right virtues and right crimes, 387; elimination of unfit, 389; power of readjusting institu- tions and programs to meet changing conditions of life, 390; protection afforded, 388; training of children, 389 Sociology, danger of applying biological laws, 381; a science, 377
Soils, characteristics and classi- fication, 11; meaning
Sparrow, European house, 90
Spectroscope, 14 Spencer, H., 378 Spermatozoon, 192
Spontaneous generation, 151 Standards, conflict of different,
Stars, classification, 1; helium- gas, 1; metallic, 2; proto- hydrogen, 1; protometallic, 2 Statistical methods, 228 Steam engine, 108 Steel, 107
Sterilization, 267
Stockard, C. R., 221-223 Struggle for existence, 65
Subnormal man, 241
Suicide, increase of, in civilized
Superman, nature of, 262
Supernormal man, 241
Surface, M. A., 80
Swine, 122
Switzerland, population
square mile, 29
Telescope, invention of, 1 Temperature, annual march of, in continental and marine cli- mates, 16; character of vegeta- tion determined by, 15; dis- tribution of life determined by, 23; importance of proper, to conditions of life, 7; in the interior of U. S., 16; influence on reproduction, 24; of human body, 8; of ocean, 16; yearly cycle, 45
Tertiary age, 184
Thomas, W. I., 318, 319, 322, 323, 328, 329
Thomson, J. A., 56, 60, 61, 63,
180, 181, 199, 382
Training of parents, and off- spring, effect on, 218
Traits, inherited, 254 Trees, value of, to man, 117 Tropics, influence of, on white
men, 33; plants in, 15
Tsetse fly, 21 Tuberculosis, 27, 138, 141 Typhoid, 138 Typhus, 139
Unit-characters, 200, 206
United States, reduction in corn crop, 19
Use and disuse theory, 168, 217
Vaccinations, 132 Vegetation, character of, deter- mined by temperature, 15
Wales, birth, death and marriage rates, 332; population fer square mile, 29
Wallace, A. R., 171
Synapsis, or conjugation of War, effect of, on society, 345
populated countries, 66
Williams, J. W., 130
Winds, effects of, on animals and man, 23; influence of, on cli- mate, 17
Women, changed industrial con- 340; progress and
ditions, genius in, 274
Woodruff, C. W., 34
Woods, F. A., 258-262, 271, 272,
World-making, process of, 2
Yellow fever, 24, 135, 136
Zones, transcontinental life, 23
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