_Gibbs, J. W._, characteristics of some African dialects, xxxviii, 41; xxxix, 255. ----, contributions to English lexicography, xxxiii, 324; xli, 28. ----, ibid, origin of the names of beasts, birds and insects, xli, 32. ----, on the adverbial genitive case in English, xlv, 96. ----, on Greek conjugations, xxxvii, 112. ----, table of Greek correlatives, xxxiv, 337. ----, on Greek verbal roots in English, xlv, 284. ----, on the orthography of Hebrew words in the Roman character, xxiv, 87. _Gibbs, O. W._, new form of magneto-electric machine, and account of a carbon battery, xxxix, 132. ----, on a natural system of chemical classification, xlix, 384. Gibbsite in Massachusetts, iii, 239, (called Wavellite); v, 269; vi, 247, 364; viii, 52. ---- in New York, xl, 75. _Gibson, J. B._, on the geology of the lakes and the valley of the Mississippi, xxix, 201. Gigantolite, analysis of, xlii, 387. Gilding by electrography, xli, 402. Gin, loss of memory from the use of, xxvi, 211. _Girard, P. S._, on navigable canals, iv, 102; vii, 286. _Girardin_, analysis of guano, xlviii, 181. Glaciers and boulders in Switzerland, _L. Agassiz_, xli, 59, 190. ---- in Switzerland, extent of, xlii, 357. ---- of the Alps, account of, _J. D. Forbes_, xlvi, 173. ---- in Scotland, former existence of, xli, 191. ----, a week among, _H. A. Grant_, xlvi, 281. Glacier theory of _L. Agassiz_, xlii, 346.^f ---- ----, remarks on, _E. Hitchcock_, xliii, 396. ---- ---- of drift, _E. Hitchcock_, xlv, 324. ---- ---- ----, remarks on, _H. D. Rogers_, xlvii, 268. Glasgow, supply of water to, iii, 372. Glass, manufacture of, iii, 370. ----, ----, _H. N. Fenn_, xvi, 112.^f ---- from burning hay, xix, 395; xxiv, 174. ----, blowing of, xxiv, 380. ----, cloth of, xxxix, 386. ----, ductility of, viii, 392. ----, on the decomposition of, _D. Brewster_, xl, 324. ----, decay of an object-, xxviii, 69. ---- decomposed, rings of polarized light produced in specimens of, _D. Brewster_, xl. 325. ----, dividing of, by friction, _R. Hare_, xiii, 7.^f ----, _Guinand's_ flint, ix, 380. ----, opaline, cause of color of, xxvi, 66. ---- for optical purposes, manufacture of, _A. Bourne_, xl, 207. ----, porosity of, vii, 192. ----, spectacle, xxvii, 80. ----, silvering of, according to _Drayton's_ method, xlix, 198. ---- beads, manufactory of, at Venice, xxvii, 78. ---- houses, improved mode of drying wood for, xvii, 163. ---- vessels, method of cutting, xxiv, 206. ---- or porcelain vessels, a crust formed on, removed by muriatic acid, xxvi, 188. Glasses, lamp, to prevent the cracking of, xxi, 165. Glauberite, xlvii, 338. Glaucolite, xv, 387. Glucinium, atomic weight of, xlvii, 189. Glyptodon, xxxvii, 232. Gmelinite or hydrolite, _A. Connell_, xxxv, 195. Gnaphalium decurrens, i, 310, 380.^f Gnathodon, _T. A. Conrad_, xxxviii, 92.^f