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, 1 15. 

 " variations of, 1 16. 



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. 



