Ilex laurifolia, v, 289. Illinois, geology of Upper, _C. U. Shepard_, xxxiv, 134.^f ----, ----, ibid, coal formation, xxxiv, 142.^f ----, Lake shore near Chicago, xxxiv, 134. ----, route, expense, &c., of the Michigan and 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 Philadelphia, notice of, _J. B. Browne_, xix, 361.^f Incas, dominion of, xxxviii, 365. Inclined planes, on, _J. Thomson_, xxiii, 107. Indelible coloring, xxiv, 373. ----, ink, see _Ink_. India, culture of cotton in, attempted, xl, 40. India rubber carpets, xxvi, 191. Indian attacks on Wheeling, xxxi, 3. ---- axe of hornblende rock, xliii, 31.^f ---- cemetery, Ohio, _S. P. Hildreth_, xxxi, 69. ---- corn, origin of, xix, 186. ---- ----, oil of, xliii, 403. ---- mounds of the West, xxii, 124. ---- ----, crania, &c., _Dr. Warren_, xxxiv, 47. ---- ----, and earthworks in the form of animal effigies, _R. C. Taylor_, xxxiv, 88.^f ---- ----, and other remains in Iowa and Wisconsin, _S. Taylor_, xliv, 21.^f ---- ----, _Col. Whittlesey_, xxxiv, 361. ---- ----, and relics, near Natchez, _C. G. Forshey_, xl, 376. ---- ----, in Louisiana, _C. G. Forshey_, xlix, 38.^f ---- ----, in Indiana, _J. T. Plummer_, xliv, 313. ---- mummies and remains in the caves of Tennessee, xxii, 124. ---- remains, skeleton, &c., xxxiv, 47. ---- races of America, characteristics of, _S. G. Morton_, xxxviii, 347; xlvii, 408. ---- ----, ancient Peruvian, xxxviii, 360.^f ---- ----, Araucanian, xxxviii, 368.^f ---- ----, Huron, xxxviii, 368.^f ---- ----, remarks on, _R. C. Taylor_, xxxiv, 88. ---- sepulchre and remains, xxxi, 8.^f ---- summer, remarks on, xviii, 66. ---- ----, remarks on, _L. Foot_, xxx, 8. ---- ----, essay on, xxvii, 140. ---- utensil, ancient, _W. R. Johnson_, xxiii, 65.^f ---- words in the English language, _J. W. Gibbs_, xli, 28. ---- ----, names of beasts, birds and insects, origin of, _J. W. Gibbs_, xli, 39. Indians, Esquimaux, remarks on, xvi, 145. ----, Seminole, ix, 132. ----, adventure of Lewis Wetzel among, xxxi, 14. ----, murder of Logan's family by, xxxi, 11.