Part 17

Giraffe, 249.

Goats, 115. limited relation to man, 116. little variation of, 117. limited intelligence of, 118.

Guinea hen, 164.

Hawking, 184.

Horse, economic value to man, 57. origin of, 58. hoof of, 61. field in which developed, 65. domestication of, 66. use in war, 67. effect of mounted men on early peoples, 69. future use in military campaigns, 70. value in agriculture, 74. mental qualities of, 75. ready variations of, 78. Norman variety of, 82. geographic varieties of, 83. Arabian variety of, 85. Indian ponies, 86. care of, 87. shoeing of, 91. influence on man, 100.

Hybrids, utility of, 96.

Insects, 190. limited value to man, 190.

Kangaroo, 240.

Mammalia, value of class as source of domesticable animals, 149. future domestication of, 238.

Mammals (tertiary), 150.

Mammoth, 129.

Man, his place in nature, 1. sudden appearance of, 6. as a destroyer, 229.

Martha's Vineyard prairie chicken, 257.

Milk, value of, as food, 110.

Monkeys, little use to man, 250. value for inquiry, 250.

Mule, 95. limitations in use of, 95. only hybrid serviceable to man, 96. mental qualities of, 98.

Musk ox, 241.

Organic hosts, 253.

Ostrich, 168. possible improvement of, 168.

Pack animals, 104.

Parks, national, etc., 256.

Pea-fowl, 162. habits of, 163. intelligence of, 164.

Pets, influence of, 223.

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.