INDEX. 



407 



V. I 



t 



Van Rensselaer, Hon. S., obituary no-' 



tice of, 156. i 



Vanuxem, L., on 3d geological district of 



M. y , 30. 

 Variation of magnetic needle, 28. ' 



Venetz, Hr., theory and phenomenon of 

 bowlders, 327. | 



Volbortliite, a new mineral, 187. j 



Volcanic action, how explained by Davy, 

 132, 3, 4, 5, and 6. 



by Bichof, 239. 

 depth of, 243. 

 by Gay Lussac, 236. 

 Volcanos and earthquakes, natural his 



torv of, 230. 

 Von Buch, L., on nature of volcanic phe- 

 nomena, 268. 

 Von Buch, L., opinion on formation of 

 certain conglomerates, 266 



observations on volcanic erup- 

 tion in island of Lancerote, 260, 264. 



observations on Palma and 

 Gran Canaria, 273. 



on formation of volcanic cones, 

 273. 



W. 



Walferdin, M, communication on subter- 

 ranean temperatures, 204. 



Warder, M A., reclamation of, 187. 



Warwickite analyzed, 8-5. 



Water contamed in a cavity, 46. 



modes of access to volcanic fires, 

 262, et passim. 



Water spout at New Brunswick in 1835, 

 115. 



Water in steam boilers, failure of, detec- 

 ted, 141. 



Webster's manual of chemistry, new edi- 

 tion, 195. 



Wells, frozen, noticed, 184. 



Whirlwinds, columnar, by W. C. Red- 

 field, 50. 



Whirlwind of 8th April, 1838, India, no- 

 ticed, 71. 



Winds occasioned by circular fires, 50. 



Wood, bituminization of, in human 

 era, 118 



Works received and acknowledged, 

 399. 



Wray, J., biographical sketch of, 223. 



Wyman, Dr. J., on an anomalous sub- 

 stance resembling bone, 381 



on fossil bones from Georgia 

 and Burmah, 385. 



on a fcetal kitten, 391. 

 recent tooth of elephant from 

 Singapore, 386. 



on the skeleton of Sloth, 382. 



Y. 



Yellow copper ore, 112. 

 Young, Dr., his cabinet of minerals for 

 sale, 393. 



Z. 



Zabriskie, on construction of galvanic 

 magnets, 124. 



electro-magnetic rotations, 129. 



