VOL 
Virtual velocities, principles of, T. 
Strong, xlii, 66; xliii, 77.f 
Virus, vaccine, liable to lose its vir- 
tue, xxxviil, 1'75. 
Vision, notice of a peculiarity in, 
C. E. Goodrich, xiv, 264.f 
Brewster, xl, 348. 
Vitality of matter, xv, 54. 
Velkel, analysis of guano, xlvill, 
Vogel, obituary of, xlili, 215. 
Vogt, C., Embryologie des Sal- 
mones, noticed, xlv, 211.f 
Voice and its modification, R. Tole- 
free, xxvi, 76. 
Volatile oils, adulteration of, xix, 
ills 
——, see farther under Oils. 
Volborthite, xlii, 387. 
Volcanoes, remarks on, ii, 351. 
, and volcanic substances, T. 
Cooper, iv, 205. 
, some account of, in a review 
of Scrope’s work, xiii, 106. 
, remarks on, in a notice of 
Daubeny’s work, xiii, 235 ;—the- 
ories of, xiv, 70, 87. 
, remarks on, from J. Phil- 
lips’s Geology of Yorkshire, xxi, 
24 
, hypothesis on, J. du Com- 
mun, xv, 12.f 
, ibid, objections to, xv, 25. 
-, ibid, strictures on, B. Bell, 
xvi, 51, 
» phenomena of, explained by 
L. Cordier, by the theory of cen- 
tral fluidity, xv, 123. 
, H. Davy’s theory of, xvii, 
239; xxxvi, 231. 
, Gay Lussac’s views on, Xxxvi, 
233, 236. 
— , G. Bischof on, xxxvi, 230, 
239f; xxxvii, 41.f 
: , theory of central heat 
satisfactory, xxxvi, 289; Xxxvil, 
52. 
—, , freshwater rivers con- 
tribute to the action of, xxxvi, 
with the head inverted, D.| 
274 
262. 
Vou 
Volcanoes, C. Daubeny, in reply to 
G. Bischof, on the chemical the- 
ory of, xxxvii, 78. 
——, L. von Buch, on certain vol- 
canoes and volcanic phenomena, 
xxxvi, 260-273. 
, geographical distribution and 
phenomena of, J. L. Hayes, xlvii, 
127. 
——, mud, iv, 216. 
, African, at the Canaries, &c., 
xill, 288; xxxvi, 260, 273. 
» ——, Azores, iv, 259; xiii, 
289. 
5 , Supposed, at sea, in lat. 
7° N., and long.99° W.,xxxii,195. 
, American, of Cosiguina, erup- 
tion of, xxvill, 332. 
, of Peru and Chili, xiii, 
308, 309. 
5 ,» of Mexico, Jorullo, 
Popocatapetl, &c., xiii, 304. 
, of the West Indies, xiii, 
2 
302. . 
9 
, of Greenland, xiii, 279. 
: , of Upper Missouri, 
only pseudo-volcanoes, J. IV. Ni- 
collet, xlv, 154. 
: , supposed, of West 
River Mountain, Vermont, J. A. 
Allen, iii, 73. 
238. 
, Asiatic, and Asiatic Islands, 
general review of, xiii, 290. 
: , near Mount Ararat, ex- 
tinct, xxxvil, 349. 
, ——, in the Kourdish coun- 
try, xxxvil, 350. 
5 , region of, or Catace- 
caumene, of Asia Minor, xxxiil, 
95; xxxvill, 206. 
—, , of Gunong-Api, iv, 
375; xill, 299. 
5 , Palambang, eruption 
of, 1833, xxix, 364. 
, European, of France,xiii,237. 
—-., , of Germany, xiii, 242. 
» ——, Grecian Archipelago, 
xill, 279. 
‘ , in Canada, xxx, 
