_Faraday, M._, deflagrator, improved, xxxii, 170. ----, electric induction, in reply to _R. Hare_, xxxix, 108; xlii, 291. ----, ---- ----, reply to, of _R. Hare_, xli, 1. ----, gases, condensation of, vii, 352. ----, ----, liquefaction and solidification of, xlix, 373. ----, views of, on the nature of atoms, objected to, _R. Hare_, xlviii, 247. ----, vaporization, limits to, xxi, 151. _Farey, J._, on musical intervals, ii, 65. Fasciculite, _E. Hitchcock_, vi, 226.^f Fata Morgana at Gibraltar, xxix, 215.^f _Fauntleroy, R. H._, condition of equilibrium between living and dead forces, xlvii, 241.^f _Faust, E. D._, on the detection of adulterations of various substances, xix, 70. Favosites, see ZOOLOGY, _Radiata_. Feathers, to restore damaged, xxi, 372. _Featherstonhaugh, G. W._, geological report on part of the country west of the Mississippi, notice of, xxviii, 379; xxxii, 185. Febrifuge, new, xxiv, 375. Fedia radiata, iv, 57. ---- umbilicata, xlii, 50. Feed for cattle, xxii, 202. ---- ----, of beets, xxii, 201. Fees for admission to various foreign societies, xx, 165. Feldspar from Bytown, L. C., analysis of, _T. Thomson_, xxxi, 173. ----, and serpentine, containing titanium, xii, 187. ----, artificial, xxviii, 396. ----, localities of, in Canada, viii, 65. ----, ----, in Connecticut, i, 353; vi, 221; vii, 253. ----, ----, in Delaware, ix, 246. ----, ----, in Massachusetts, i, 113; vii, 251, 252; xxxv, 192. ----, ----, in New Hampshire, xvii, 355. ----, ----, in New Jersey, v, 246. ----, ----, in New York, iv, 37, 47; xix, 227; xxv, 348. ----, ----, in Pennsylvania, x, 220; xiv, 13. ----, green, in Massachusetts, vii, 251, 252; xxxv, 192. ----, iridescent, in Pennsylvania, xiv, 13. _Fellenberg's, M. de_, colony of little Robinsons, xiii, 165. Fence, thorn, x, 167. _Fenn, H. N._, on the manufacture of glass, xvi, 112.^f Fermentation, acetic, process for hastening, xxii, 195. Ferns, on the vascular system of, _J. W. Bailey_, xxxv, 113.^f ---- and mosses of the United States, synoptical table of, _L. C. Beck_, xv, 287. ----, see _Botany_. Ferro-cyanate (per), of iron, or prussian blue, xviii, 332. ---- ----, see _Prussian blue_. Ferro-cyanate of potash, xviii, 331. Ferro-cyanic acid, xviii, 330. Fetid odor of limestones, cause of, _L. C. Beck_, xlv, 335. _Feuchtwanger, L._, remarks on arsenic, xix, 339.^f ----, on the mode of making vinegar, xxxi, 272.^f Fevers, on remittent and intermittent, _J. McCulloch_, xviii, 338. Fibrine, albumen and caseine, _Scheerer_ on the isomerism of animal, with vegetable, xliii, 402. ----, butyric acid from, xlviii, 186. Fibrolite, in Delaware, x, 224. Ficoidites scabrosus, xxxi, 31.^f _Field, M._, on the origin of ergot, ix, 359. ----, meteorological registers, xii, 364; xvi, 288; xviii, 366; xx, 261^f; xxii, 298; xxiv, 361. ----, profile mountain, in N. H., xiv, 64.^f