Nitrous atmosphere of Tirhoot, xx, 199. ---- ether, new process for, _R. Hare_, ii, 326.^f ---- gas, theory of the action of, in eudiometry, _J. F. Dana_, vii, 338. ---- oxide, effects of, v, 194. ---- ----, condensation of, vii, 355. ---- ----, method of obtaining, _R. Hare_, xvi, 295, 297.^f ----, ----, properties and composition of, xvi, 298. _Nobili, L._, new thermo-electric piles of, xxviii, 397. ---- and _Melloni_, new experiments on heat, xxiii, 185. _Noggerath_, on compression of air, xvii, 38. Nomenclature of minerals, i, 45. ----, chemical, _J. J. Berzelius on_, xxii, 248;--(letter) xxxii, 262. ----, ----, _R. Hare_ on, xxvii, 63; xxxii, 259; xlix, 249. ----, ----, _W. Whewell_ on, xxi, 369. ---- of numbers from ten to twenty, xlvi, 215. ---- of the stars, revision of, under the direction of the British Association, xxxviii, 94; xl, 310; xlii, 147; xliv, 158. ----, zoological, _A. A. Gould_, xlv, 1. ----, ----, remarks on, _S. S. Haldeman_, xlvi, 18. ---- of the Palæozoic strata of the Appalachian basin, xlvii, 154. _Nooney, J._, on the astronomical operations at Pulkova Observatory, xlvii, 88. Nooth's apparatus, a substitute for, _R. Hare_, i, 410.^f _North, E._, on fuel, xi, 66. North America, Report on the Zoology of, xxxi, 343, 356, 376. North American Medical and Surgical Journal, xviii, 203. North Carolina, basalt, basaltic dikes ("natural walls") and petrifactions of, _J. Beckwith_, v, 1. ----, natural walls of Rowan, xiv, 242. ----, mining district of western part, _J. Peck_, xxiii, 1.^f ----, origin and character of the low country, _E. Mitchell_, xiii, 336. ----, red sandstone of, _D. Olmsted_, ii, 175. ----, rocks and minerals of, _D. Olmsted_, v, 257. ----, geological survey of, in contemplation, v, 202;--_D. Olmsted's_ Report on the Geology of, noticed, xiv, 230. ----, _J. Dickson_ on the mineralogy and geology of, iii, 1. ----, _T. D. Porter_, ibid, iii, 227. ----, gold, miscellaneous notices of, iii, 3; xvi, 360; xvii, 400; xlviii, 398. ----, ----, large mass of, ix, 9. ----, ---- mines of, _D. Olmsted_, ix, 5; xiv, 237. ----, ----, on the mines of, _C. E. Rothe_, xiii, 201.^f ----, ----, on the region of, _E. Mitchell_, xvi, 1.^f ----, remarks on, _J. Peck_, xxiii, 1.^f ----, ----, on the nature of the deposits of, _F. L. Smith_, xxxii, 130. ----, ----, talcose slate, the rock of, _A. Eaton_, xviii, 50. ----, heights of several mountains in, with remarks on their features, (Table Mountain, Roan, Black, Grandfather, Yeates's Knob, Pilot,) _E. Mitchell_, xxxv, 377. ----, temperature of wells and springs, xxxv, 379. North magnetic pole, revolution of, around the north pole of the earth, xxix, 352. North pole and northwest passage, i, 101. Northern Antiquaries, Society of, xlii, 214. Northern lights, see _Aurora Borealis_. Northwest passage, and Greenland ice, i, 101. ---- ----, _I. Lea_, x, 138.