Expedition, exploring, under L. Cass, ii, 178. ----, ----, U. States, under Lieut. Wilkes, U. S. N., officers of, xxxv, 192. ----, ----, ----, progress of, xxxvi, 195; xxxvii, 189, 398; xxxviii, 387; xxxix, 193. ----, ----, ----, discoveries of, in the Antarctic regions, xl, 394; xlix, 150. ----, ----, ----, return of, xliii, 208. ----, ----, ----, course and abstract of results, xliv, 393. ----, ----, ----, account of, xlix, 149. ----, ----, Antarctic, of the Chanticleer, notice of, xviii, 188. ----, ----, British Antarctic, under Ross, proposed, xxxvii, 397; xlii, 153; sailed, xxxviii, 204. ----, ----, French, to the Antarctic regions, xxxix, 201. Explorations, polar, account of, xvi, 124. ----, ----, French, of Capt. Freycenet, iv, 391. ----, ----, ----, of Capt. D'Urville, xxxiii, 206. ----, ----, ----, ibid, to Antarctic regions, xxxix, 201. ----, ----, ----, of the Bonite, xxxiv, 219. Exploring expedition, see _Expedition_. Explosion, singular, iv, 400. ---- of hydrogen and oxygen, with remarks on Hemming's safety tube, _J. W. Webster_, xxxvii, 104. ----, from the action of nitric acid on phosphorus, xvi, 366. ----, submarine, ii, 95. Explosive engine, by _S. Morey_, xi, 104. Eye, mode of accommodation of, to different distances, _W. C. Wallace_, xxvii, 216.^f ----, mode of exhibiting the blood vessels of, xxi, 166. ----, muscle attached to the lens of, _W. C. Wallace_, xxxv, 291; --remarks on, _D. Brewster_, xxxv, 291. ----, cause of _muscæ volitantes_ in, _D. Brewster_, xl, 333. ----, remarks on the retina, _W. C. Wallace_, xxviii, 278. ----, sensibility of the retina, explanation of facts in natural magic, xxxiii, 258. ----, on cataract or disease of, _D. Brewster_, xxxi, 368. ---- of fishes, discovery of a muscle in, _W. C. Wallace_, xxvi, 394. ---- of the Halibut, dissection of, _W. C. Wallace_, xxvi, 393.^f ---- of the shark, vitreous humor of, _J. Herschel_, xxxv, 293. ---- of the streaked bass, dissection of, _W. C. Wallace_, xxvii, 216.^f ---- of different birds and reptiles, sclerotic bones of, xxxiii, 289. ---- infirmaries in U. States, ix, 399. F. Fac similes of writing taken by means of fusible metal, v, 186. Fair at Leipsic, iv, 392; vii, 381. ----, in Russia, iv, 392. Falls of the Cuyahoga, xxxi, 45.^f ----, on the Genesee river, xviii, 209.^f ----, Niagara and its vicinity, xi, 213.^f ----, ----, on the retrograde movement of, _H. D. Rogers_, xxvii, 326.^f ----, the Tockoa and Tallulah, in Georgia, notice of, _A. Foster_, xiv, 209. ----, on White River, Green Mountains, Vt., vi, 252.