INDEX. 359 



V. 



Vermillion, adulterations of, 184. 



Vertebrata, first appearance of, in geological strata, 263. 



Vesication, nature of, 196. 



Victoria, planet, 257. 



Violacece, 323. 



Vis inertiae, 256. 



Vis viva, 256. 



W. 



Walker, S. C. On the velocity of electricity, 235. 



Warren, John C. On the Eppelsheim fossils, and Dinotherlum 



giganteum, 305. 

 Water, action of, on lead pipes, 62. 

 Water, spheroidal state of, 178, 180. 

 Water-level of United States coast, marks to indicate, 111, 123, 184, 



221, 225. 

 Weights, French system of, 244. 

 Wilkesia, gen.. Gray. 



gymnoxiphiuin, G., 160. 



THE END. 



DUPLI^IATE 



From the Public Jiibrary of the City of 

 Boston. 



