IND£:X 



623 



Violins, why they become mellow with 

 ago, iL 143. 



Virgil and spontaneous generation, L 

 418. 



Virtual velocities, i. 36, 40. 



Visual perception not originally cog- 

 nizant of distance, ii. 108. 



Visual sensations, how compounded, ii. 

 127. 



Vision and touch, ii. 90; range of, in 

 savages and civilized men. ii. 299. 



Vital Principle, i. 127, 197, 422. 



Volition, rise of, ii. 156 ; definition of, ii. 

 177 ; theory of the lawlessness of, i. 

 J93: ii. ISO. 



Voltaire's Microm€gas. i. 81. 



Von Baer, i. 40, 208, 342. 



Wagxer, 5Ioritz, his testimony in favour 

 of the derivation theory, i. 463. 



Wallace, A. R. , on natural selection, ii. 

 5 ; his brilliant theory of the action of 

 natural selection on man, ii. 318 ; his 

 experience with an infant orang-outang, 

 iL 343. 



Wa'-fare, its tendency to disappear, 11, 



247. 

 Waste and repair in brain, iL 140. 

 Water unchanged in its passage through 



the animal organism, i. 410. 

 Whales and ichthvo-aurians, ii. 58. 

 Whately, R., ii. 193. 

 Whcwell, W., on firal causes, ii. 384. 

 Will, freedom of, i. 54, 198; ii. 173. 

 Winslo.v, Forbes, ii. 2(). 

 Witchcraft, belief in, ii. 379. 

 Wollastou obtained crystals of quartz, i. 



242. 

 Worship, its object not the known but 



the unknown, ii 420. 

 Wright, Chauncey, i. 105. 

 Wrought-h-ou rendered crystalline by 



vibration, i. 3 10. 

 Wvrouboif ou the scope of geology, it 



200. 



Young, Thomas, L 130. 



Zoology, as related to biology, i. 212, 



THE END. 



