Figures of crystals, on the drawing of, _J. D. Dana_, xxxiii, 30.^f Filicites, generic characters of, vii, 181. Filter, _Dumont's_, and prepared charcoal, xxiii, 346.^f Filtration, xxviii, 150. _Finch, J._, atomic theory, remarks on, xiv, 24. ----, chemical equivalents, circular scale of, xviii, 196. ----, celtic antiquities of America, vii, 149. ----, forts about Boston, viii, 338. ----, geology of Pennsylvania, Easton, viii, 236.^f ----, ---- ----, vicinity of Westchester, xiv, 15. ----, ---- New York, St. Lawrence Co., xix, 220. ----, ---- ----, tertiary formations of the borders of the Hudson, x, 227. ----, sandstone, new or variegated, of the U. States, x, 209.^f ----, U. States tertiary formations, vii, 31. ----, physical geography, influence of, on the boundaries of nations, xiv, 18; xvi, 99. Finland, comforts of traveling in, iii, 378. Fire, Chinese, on the composition of, _J. Cutbush_, vii, 118. ----, Greek, _J. Cutbush_ on, vi, 302. ---- in chimneys, extinguishment of, by sulphur, xix, 186. ----, on protection from, or securing houses against, xxv, 290; xxvi, 286. ----, whirlwinds produced by, xxxvi, 50. ---- arms, manufacture of, by _E. Whitney_, xxi, 237. Firebricks, made at Bennington, Vt., for the iron furnace, xxxii, 195; xxxiii, 202. Fire damp, chemical examination of, _E. Turner_, xxxvii, 201. Firemen, preservation of, against fire by asbestos, xviii, 177; xx, 96.^f Firestones, used in glass manufactories, notice of, x, 19. ----, localities of, in the U. States, x, 20. ----, ----, in Rhode Island, viii, 232; x, 20; xl, 184. Fish, double, _S. Churchill_, xxvi, 116.^f ---- of Hudson river, xx, 150. ----, Chinese method of hatching, viii, 381. ----, preserved by sugar, viii, 391. ----, fall of, from the atmosphere in India, _M. Prinsep_, xxxii, 199. ----, the limits of their occurrence in high latitudes, vi, 383. ----, removal from salt to fresh water, xl, 405. ----, see farther under _Zoology_. ----, fossil, remarks on, _R. I. Murchison_, xxxiv, 46. ----, ----, of England and Scotland, xxviii, 75. ----, ----, American, _W. C. Redfield_, xli, 24. ----, ----, ----, identified from fossil teeth, _L. Agassiz_, xxviii, 276. ----, ----, in the Connecticut valley, _E. Hitchccock_, vi, 76.^f ----, ----, ----, at Sunderland, Mass., _E. Hitchcock_, iii, 222, 365. ----, ----, ----, at Middletown, _D. L. H._, xxxiv, 198. ----, ----, ----, at Southbury, xxvii, 354. ----, ----, in New Jersey, _W. C. Redfield_, xxxvi, 186; xliv, 134^f; xlv, 314. ----, ----, ----, and Connecticut, identical, _W. C. Redfield_, xxxvi, 186. ----, ----, ----, in red sandstone, _Prof. Gale_, xxxv, 192. ----, ----, in Pennsylvania, at Blossburg, Holoptychus nobilissimus, xlii, 233. ----, ----, in Virginia, _W. C. Redfield_, xxxiv, 201. ----, ----, see farther under _Zoology_.