Pig, origin of, [140].
value of flesh, [140].
progressive domestication of, [142].
intelligence of, [143], [148].
variations in habits of, [147].
Pigeons, [175].
origin of, [176].
breeds of, [177].
mental qualities of, [180].
Plants, danger of extinction of species of, [250].
Refuge stations. (See Reservations.)
Reservations (of wilderness), [256].
American, [256].
foreign, [259].
cost of, [261].
Rhinoceros, [249].
Rights of animals, [204].
origin of, [205].
Savages, relation of, to animals, [219].
Seals, possible domestication of, [243].
Sheep, [115].
value of wool, [115].
variations of, [116].
mental qualities of, [118].