incoming white man on, 84;
insect life controlled by, 87;
man's ruthless destruction of,
86; migratory, government
control of, 95; predacious, 80;
in U. S., 85; value as food, 119
Birth rate, according to degree
of wealth, 335; checked by race
crossing, 296; difference in
number of boys and girls, 313;
decrease in, 331-334; decrease
in, in America, among natives
and immigrants, 335-336; de-
crease in, in France, 334; fac-
tors affecting, direct, 340;
factors affecting, indirect, 337-

340

Boas, F., 33, 287-289, 375
Bob-white, 77

Bourbons in Spain, 260

Brain, human, 239; weight, 290
Brenner Pass, 30

Bubonic plague, 133

tions, 35

California, big trees in, 44

Camel, 122

Canada, birth and death rates,

334

Cancer, 141
Candles, 104

Carbohydrates, 10

Carbolic acid, 130

Carbon, compounds, 9; impor-
tance of, to living organisms, 9

Carboniferous era, 105
Castle, W. E., 210, 221
Cat, domestic, 121
Caterpillars, 181

Cattell, J. McK., 341-342
Cattle, 122; dairy, 127
Caucasian, classified, 277
Celibacy, 338

Cell, cytoplasm, 197; definition
of, 192; discovery, 192; divi-
sion, in forming life, 194; re-

Elements, physical, 2

Death-rate, gradual reduction,
147; of women at childbirth,
130; statistics of various
countries, 334

De Candolle, A., 111, 113
Defects, mental, inherited, 254
Degenerate families, 266
De Vries, H., 198

Dexter, E. G., 35, 36, 37

Diphtheria, 140

Discoveries, by early man, 99

Disease, among plants, 146;

European starling, 90

333

Fraser, W. J., 127

Galton, Francis, 228, 229, 266,
271, 337

Genius, common or rare? 270;
inheritance of, 258; and in-
sanity, 263

Geographic conditions, influence
of, on economic and social de-
velopment, 31

Germ cells, 193; division, 195;
human, 266

Germany, birth and death rates,

333

Herbert, S., 229

Heredity, in royal families of

Europe, 258, 260; meaning of

word, 230

Herter, C. A., 56

Hessian fly, 92
Hibernating animals, 47
Hill, J. A., 336

Hoffman, F. L., 298

Holland, birth and death rates,

333

Hollingworth, Mrs. L. S., 325-

326

Ichthyosis, 211

Ihering, R. von, 388
Imbecile, 243

Immigrants, influence of new en-
vironment on, 33

Immigration, effect of, on birth
rate, 339

Importation of plants and ani-
mals, 89

Indians, Aymara, 32; Quichua,

32

Industry, modern, effects on so-
ciety and population, 347, 350
Infancy, increased length, 337;
period, in man as compared to
animals, 357

Inheritance, blended, 207; neu-
rotic, 252; sex-limited, 210;
statistical laws, 228

Insanity, causes of, 252; forms
of, 253; and genius, 263
Insect pests, aphis, 74; boll
weevil, 73; codling moth, 74;
corn-root worm, 74; damage
done to U. S. crops in 1904, 72;
gypsy moth, 89; Hessian fly,
74; San José scale, 89

Insects, abundance of, in wet
seasons, 22; attacking domes-
tic animals in U. S., 144; serv-
ices in plant fertilization, 60;
social life of, 62; value to man,
124

Institutions, crystallization of,
391; organized to meet human
needs, 362

Interrelations, between highest
and lowest forms of life, 38
Intestines, flora of, 56

Inventions, great changes pro-
duced by modern, 367; influ-
ence on man, 101; of primitive
man, 98; physical and social
effects, 369; suggested by ani-
mals, 100

Iowa, birds in, 78
Iron, 107

Ishmaelites, 266

Italian, change of head form,
288

Japanese, 101

Java, density of population, 31
Jew, change of head form, 288
Johnston, Sir H. H., 277-278,
292, 299

Jukes, The, 266

Kallikak Family, 245, 266
Kammerer, P., 223-224
Keen, W. W., 131, 140
Keller, A. G., 379, 380
Keller, C., 120, 121
Kellogg, V. L., 177, 179
Kirkland, A. H., 83
Koch, R., 128
Kropotkin, 65-69
Kuczynski, R., 335

Lake Michigan, forms of life in,
57; temperature, 16
Lamarck, 168; "use and disuse "
theory, 217
Lapouge, G. V., 296-297
Lawton, L., 300-301
Lehr's Genealogy, 271
Leroy-Beaulieu, 335
Life, dangerous types of, 84;
distribution of, 6; relation of,
to matter, 5; stratification of,
in ocean and lake, 26

Light, its control of growth, 14;
in bodies of water, 26
Lighting, by candle, 104; by
coal-gas, 104; by electric light,
104; by kerosene, 104
Linnæus, 164, 165, 303
Lipman, J. G., 54
London, 17
Longevity, heredity of, 254
Lydston, G. F., 265

Machine power, development,

110

Malaria, 21, 129
Malnutrition, 250
Mammals, 183

Man, early inventions, 98; early
life and conditions, 353; four
characteristics, which give him
supreme place, 184; his de-
struction of plant and animal

life, 92; his progress, as in-
fluenced by environment, 274;
influenced by physical world,
28; inherited characteristics,
211; part of animal kingdom,
177; primitive, 98, 372; time
on earth, 189; types of culture,
100

Marlatt, C. L., 75
Marriage, necessity for care in
selection in, 269; prohibition,
to stop reproduction of unfit,

267

Marriage rate, in England and
Wales, 332

Marsh Island, 95

Martha's Vineyard, 238

Mason, O. T., 99

Matches, invention of, 98

Maturity of Indian boy as com-

pared to that of American, 357

Mayo, E., 133, 138

McClung, C. E., 208

McCoy, G. W., 134

Mendel, G., 199, 200, 202

Mendelian phenomena, 200ff; in

men, 211, 234

Merriam, C. Н., 24

Mesozoic age, 183

Metabolism, 10

Metals, discovery of, 106

Moore, E. C., 181

Morgan, T. H., 197, 313
Mongolian, classified, 277
Mongoose, 91

Morality, different standards,

356

Morons, 244, 251

Moth, brown-tailed, 90; gypsy,
89

Multiple sclerosis, 211
Musical ability in families, 256
Muskrats, 92
Mutation, 198, 213
Mutual aid, 65

Nature, man's control of, 97
Neanderthal type of skull, 188
Near-sightedness, 211

Negro, 34; adaptation to tropics,
291; classified, 277; racial
purity, 278

Negro slaves in South, 31
Neurotic inheritance, 252
New England States, occupation

in, 31

New Zealand, birth and death
rates in, 333

Night-blindness, 211

Nitrogen, importance of, in soils,

12

Normal-minded man, 241

Novicow, J., 295

Nuts, value of, 114

Occupations, of men, 31

Offspring, and training of par-

ents, 218

O'Malley, A., 337

79