Olmsted_, viii, 294; ix, 170; x, 362. ---- ----, from peat, xxx, 189. ---- ----, from rosin, xxviii, 147. ---- ----, from wood, xix, 383. ---- ----, for light-houses, xxviii, 355. ----, portable, xv, 189. ----, illuminating powers of, viii, 181. Gaseous mixtures, analysis of, _R. Hare_, xv, 279, 283. Gasometers, new mode of suspending, _R. Hare_, iv, 312.^f Gasometer, _J. H. Patten's_, ix, 92.^f Gasport, gas of, xv, 236; xxxi, 246. Gastric juice, notice of _Wm. Beaumont's_ work, containing experiments on, _A. St. Martin_, xxvi, 193; xxvii, 405. ---- ----, ibid, _J. J. Berzelius_ on, xxvii, 406. ---- ----, analysis of, _H. Braconnot_, xxx, 378. _Gauss's_ theory of terrestrial magnetism, examination of, _E. Loomis_, xlvii, 278. Gavial of Caen, analysis of the scales of, _A. Connell_, xxxiv, 201. Gay Lussite, xii, 187. _Gay Lussac_, explanation of volcanic action, xxxvi, 236. _Gaylord, W._, influence of the great lakes on our autumnal sunsets, xxxiii, 335.^f ----, mechanical vaporization of earths, xxxvii, 398. ----, account of a tornado in Onondaga Co., N. Y., xxxvii, 90. ----, formation and dispersion of a thunder shower, xxxix, 54. ----, parhelia seen at Otisco, New York, January, 1840, xxxix, 61.^f ----, average temperature, weather and winds, for 1838 and 1839, at Otisco, N. Y., xxxix, 63. _Gazlay, S._, fossil wood in Ohio, xxv, 104. _Gebhard, J._, geology and mineralogy of Schoharie Co., N. York, xxviii, 172.^f _Geddes, J._, geological features of the south side of the Ontario valley, xi, 213.^f Gelatine from bones, i, 170; xxii 369. Genesee river, account and view of upper falls of, xviii, 209.^f Gems, practical remarks on, _T. Taber_, xxxviii, 61. Geodes, facts tending to illustrate the formation of crystals in, viii, 282. ----, ibid, _J. D. Dana_, xlix, 49. Geography, distribution of land and water, xiv, 375. ----, physical, _G. F. Schouw_, xxi, 127. ----, ----, influence of, on the boundaries of empires, _J. Finch_, xiv, 18; xvi, 99. Geogony of Leibnitz, xx, 56; xxxix, 15. ----, or on the probable origin and systematic arrangement of rocks, _W. Maclure_, vii, 261. ----, or on the formation of the universe, _I. Orr_, vi, 128.^f