318 
latent, 100; lost, Io2; new, 103; 
tend to combine in definite propor- 
tions, 141; that do not blend, 144 
Cherry, origin of, 271 
Chess, 299 
Chillingham cattle, 225 
Chromosomes, 125, 127 
Cipo, 25 
Civilization, aided by slavery, 27; 
requires domestication, 26 
Clothing, sources of, 4 
Clover, kinds of, 258; origin of, 259; 
sweet, 261 
Coal, source of, 5 
Coca, 294 
Coefficient of variability, 112 
Cocklebur, 299 
Collie and coyote contrasted, 22* 
Color, causes of, 77 
Competition greatest between indi- 
viduals of the same species, 61 
Corn, broom, 252; Indian, origin of, 
246; meaning of term, 246; polli- 
nation of, injured by rain, 54 
Corncob, hand-shaped, 138* 
Correlation of characters, 1or 
Cotton, 296 
Cow, choice butcher, 189* ; medium 
butcher, 191* 
Cowpea, 265 
Coyote and collie contrasted, 22* 
Creation not finished, 12 
Crossing, 187 ; in plant improvement, 
199; May give a pure race, 148 
Curve of frequency, plotting of, 106 
Dachshund, 209 
Dane, 210* 
Darwin, “Origin of Species,” 52 
Davenport, C. B., “ Statistical Meth- 
ods,” 120 
Deer, albino, 102 
Degeneracy, 163 
Dehorning, 91 
Design in nature, 77 
Development, 128; arrested, 132; 
going wrong, 130 
Deviation, average, 109; standard, 
III 
Differentiation, 128 
Dingo, 208* 
Distribution, 106; sample of, 118, 
119 
Dog, contrasted with wolf, 22*; origin 
of, 22, 207 
DOMESTICATED ANIMALS AND PLANTS 
Domesticated animals and_ plants, 
need of improvement in, 35 
Domesticated races, come from the 
wild, 14; variation of, 11; where 
originated, 11; wild relatives of, 12 
Domestication, a gradual process, 16, 
2; first steps of, in the hunt, 24; 
in civilization, 26; for additional 
food, 22; for clothing and shelter, 
25; for the hunt, 21; generally 
means improvement, 14, 35; his- 
tory of, how known, 17; often 
means readjustment, 91; result of 
necessity, 20; unwelcome, 239 
Dominant characters, 101, 146; be- 
havior of, 200 
Dorset, 227* 
Duck, origin of, 236 
Dwarfing, 131 
Environment, adds no unit charac- 
ters, 174; and heredity, 171; func- 
tion of, 173; mistaken estimate of, 
171; modifications due to, 175 
Eskimo dog, 216 
Feeder, choice, 187*; inferior, 185* 
Feral as distinct from wild, 18 
Fertilization, 124 
Festucas, the, 255 
Fittest, survival of, 64 
Flax, 296 
Food, competition for, 54; sources of, 3 
Frequency curve, plotting of, 106 
Fruits, origin of, 267 
igalla ox, 222 
Galton, studies, 155 
Gas, source of, 5 
Gaur, 219, 220* 
Gayal, 220 
Giants, 132 
Goat, origin of, 231 
Goose, origin of, 236 
Grading, 187 
Grape, wild, 15* 
Grasses, book on, by Beal, 225; mis- 
cellaneous, 255; origin of, 254 
Grouping, suggestions as to, 114 
Growth, 128; as determined by leaf 
surface, 61; termination of, 129 
Growths, abnormal, 140 
Guinea fowl, 238 
Guinea pigs, behavior of, under 
Mendel’s law, 147-149 
