IGun 
127 
IN D 
Icebergs, character of, and factscon-|[gneous origin of some trap rocks, 
cerning, J. L. Hates! xlv, 316. 
and currents of the North At- 
lantic, W.C. Redfield, xlviii, 373.4) 
in low latitudes, xxii, 200. 
——, theory of drift, see Drift. 
Ice houses, natural, iv, 174. 
—— ——, ——, in Salisbury, Ct., 
Vili, 254. 
Sa es neal Williams- 
town, Mass. ., lV, ddl; v, 398. 
» ——., of St. Ouen, xii, 
184, 
Ice mountain of Hampshire Co., 
Va., C. B. Hayden, xlv, 78. 
throp, xlvi, 331. 
water, drinking of, xv, 194. 
Iceland, notice of, xvii, 15. 
, geysers, springs, &c. of, E. 
Robert, xxxi, 167; xxxii, 196. 
f , remarks on, G. Bis- 
chof, xxxvi, 255. 
Ichnolithology, see Footprints. 
Ichthyolites, see Fish. 
Ichthyosaurus, largest, found by 
Mary Anning, xxviii, 369. 
——., in U. States, xxvii, 353. 
at Strensham,England,xxxviii, 
126. 
Ichthyosauri, T. Hawkins,xxvii,413. 
Iconography, xxxiii, 184. 
Ideler, J. L., views of, on meteor- 
ites, shooting stars and Auroras, 
Xxvill, 288. 
Idocrase, analysis of, T. Richard- 
Son, Xxxvill, 120. 
——, of Skye, xxviii, 395. 
, American, first detected, W. 
Meade, vii, 50. 
, crystal, from Amherst, N. H., 
xlvi, 381.f 
, In Connecticut, ix, 44. 
, in Massachusetts, viii,44; x, 11. 
,in N.York, xvii, 145; xxi,827; 
xlvi, 35. 
——, in Rhode Island, vill, 230. 
Idria quicksilver mines, xxix, 219. 
Igneous action, as indicated by cer- 
tain eras ¢ in New York, L. C. 
Beck, xlvi, 333. 
in Vermont, S. P. La-| 
155, Silimem. xvil, 119. 
ibid, de Osopert iv, 205. 
theory of ‘the earth, remarks 
on, W. Maclure, xvi, 351. 
, as connected with 
the secular variation of the mag- 
netic needle, J. H. Lathrop, 
XXXvlll, 68. 
, applications of, 
ibid, xxxix, 90. 
Ignis fatuus, observations on, J. 
Mitchell, xvi, 246. 
Iguanodon, bones of, in Mantell’s 
Museum, xxiii, 165. 
, discovery of, xxvii, 355.f 
, Maidstone, XXVIl, 420. 
Hlicine, i in fevers, xxi, 349. 
Tlex laurifolia, v, 289. 
Illinois, geology of Upper, C. U. 
Shepard, xxxiv, 134.f 
» ——, ibid, coal formation, 
XXXIV, 142. 
, Lake shore near Chicago, 
xxxlv, 134. 
, route, expense, &c., of the 
Michiganand Illinois canal, xxxiv, 
138. 
, mineral and brine springs, 
xxxiv, 157. 
Ilmenite, (Crichtonite,) localities of, 
in Connecticut, xii, 161, 170; 
xxxv, 179; xliii, 364.f 
, in Pennsylvania, xiv, 6, 7. 
>in Rhode Island, xxxv, 180. 
Impression in marble near Philadel- 
phia, notice of, J. B. Browne, 
xix, 361.f 
Incas, dominion of, xxxviii, 365. 
Inclined planes, on, J. Thomson, 
xxi, 107. 
Indelible coloring, xxiv, 373. 
—— ink, see Ink. 
India, culture of cotton in, attempt- 
ed, xl, 40. 
India rubber carpets, xxvi, 191. 
Indian attacks on Wheeling, xxxi, 3. 
axe of hornblende rock, xliii, 
31f 
cemetery, Ohio, S. P. Hil- 
dreth, xxxi, 69. 
