INDEX 



267 



Pig, 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. 

 Silkworm, 197. 

 Turkey, origin of, 165. 



variations of, 166. 

 mental qualities of, 167. 

 Vivisection, 21 1. 

 Water-birds, 169. 



flight of, 169. 



" sympathetic quality, 171, 



Wildernesses, destruction of, 224. 



" reservations of, 256. 



Wool-bearing animals, 114. 



