320 



DOMESTICATED ANIMALS AND PLANTS 



Peach, and nectarine, 151 ; origin of, 

 271 



Peacock, 238 



Pear, origin of, 269 



Pearson, work of, 167 



Pedigree registers, 179 



Penholder, 133 



Petroleum, source of, 5 



Pig, bush, 233 ; origin of, 231; rela- 

 tives of, 231 



Pigeons, varieties of, 93-95 



Pine, Jack, 54 



Plant breeding, records in, 202 



Plant improvement, Mendel's law in, 

 199 



Plant lice, increase of, 51 



Planting, systems of, 202 



Plants as sources of clothing, 4 ; as 

 sources of food, 3 ; as sources of 

 heat and light, 5 ; as sources of 

 raw material, 8 ; as sources of 

 shelter, 5 ; cultivated, origin of, 

 241 ; domesticated, need of im- 

 provement in, 35; improvement 

 of, 198; medicinal properties of, 

 9; ornamental, 298 



Plow, the primitive, 26 



Plum, origin of, 269 



Plumb, Types and Breeds of Farm 

 Animals, 97 



Pointer, 209 



Pollen, function of, 125 



Poodle, 209 



Poppy, opium, 294 



Prairie chicken, 224 



Prime steer, 194* 



Progression, 160 



Protective coloring, 74 



Pure bred, 178 



Python, legs of, 133 



Quagga, 217 



Recessive characters, behavior of, 



101, 146, 200 

 Redtop, origin of, 254 

 Registry, advanced, 183 

 Reversion, 163 

 Rice, origin of, 250 

 Room, competition for, 58 

 Rye, origin of, 249 



Samples, suggestions as to taking, 



117 

 Scrubs, 185 



Selection, effect of, in making a " fit," 

 85; effect of, upon the individual, 

 84 ; effect of, upon the species, 84 ; 

 improvement by, 198; individual 

 and the race contrasted, 85; our 

 standards different from those of 

 nature, 88 ; power of, to modify 

 type, 93-95 ; the individual and the 

 race, 66 



Selective effect of natural conditions, 



53 

 Setter, 209 

 Sheep, breeds of, 230 ; domesticated, 



229* ; fat-tailed, 230 ; origin of, 



227 ; relatives of, 229; wild, 228 

 Shelter, sources of, 5 

 Shorthorn cattle, origin of, 1 1 

 Silk, elongated, 123* 

 Sir Donald of Banff, 223* 

 Sires, source of, 192 

 Six Nations, 247 ; civilization of the, 



17 ; food of, 23 

 Slavery, civilizing effect of, 27 

 Sorghum, origin of, 251 ; strains of, 



251 



Soy bean, 265 



Spermatozoon, function of, 125 



Splint bones, 213 



Standard deviation, in 



Statistical studies, advantages of, 118 



Stature, table of, 156 



Steer, baby beef, 196*; common 

 rough, 192*; prime, 194* 



Struggle for existence, 52 



Sugar cane, origin of, 252 



Survival of the fittest, 64 ; signifi- 

 cance of numbers, vigor, length of 

 life, 69 ; significance of weapons, 



7i 

 Swan, 238 

 Sweet clover, 261 



Tarpan, 2 1 1 



Thistle, Canada, 299 



Thoroughbred, 179 



Timothy, origin of, 254 



Tobacco, 295 



Toltecs, 247 



Transmission, machinery of, 122; of 

 unit characters, 121 ; table of 

 stature, 156 



Turkey, 224 ; origin of, 237 ; rela- 

 tives of, 237 



Type modified by selection, 93 



Types, 106 



