Fossil fruits of Zamia, _G. A. Mantell_, xlv, 401. ---- plants, of coal regions of Wilkesbarre, Pa., ix, 165. ---- ----, ---- ---- of Ohio valley, _S. P. Hildreth_, xxix, 1.^f ---- ----, ----, in Ohio, at Mariner's Mill, xxxi, 28.^f ---- ----, ----, in England, iii, 389. ---- ----, in new red sandstone of England, remarks on, xxxiii, 270. ---- ----, below the coal in England, xxxiii, 87. ---- ----, _A. Brongniart_ on, iv, 266.^f ---- ----, analysis of _Ad. Brongniart's_ work on, vii, 178. ---- ----, _H. R. Göppert's_ views on the lapidification of, xxxiii, 109. ---- wood or trees, silicification of, xxxiii, 108. ---- ----, ----, ibid, _J. D. Dana_, xlviii, 83. ---- ----, in Connecticut, near Southbury, a trunk of a tree, xiv, 228. ---- ----, in England and France, _A. Brongniart_, iv, 269.^f ---- ----, ----, Craigleith quarry trees, xxviii, 390. ---- ----, at Granton, near Edinburgh, xxxvii, 363. ---- ----, in Indiana, palm trees, _D. D. Owen_, xlv, 336. ---- ----, ----, trees with axe marks, _J. T. Plummer_, xliv, 303. ---- ----, in Louisiana, trees with axe marks, _W. M. Carpenter_, xxxvi, 118.^f ---- ----, Michigan, tree near lake, iv, 285. ---- ----, in New York, at Chittenango, calcareous tree, v, 251; xviii, 354. ---- ----, in N. Carolina, v, 261. ---- ----, ----, tree, siliceous, vii, 249. ---- ----, in Nova Scotia, xxx, 340.^f ---- ----, in Nova Scotia, upright trees, xlv, 353. ---- ----, in Ohio, _S. Gazlay_, xxv, 104. ---- ----, ----, trees near Gallipolis, _S. P. Hildreth_, xii, 205. ---- ----, in Russia, vi, 398. ---- ----, in Scotland, near Glasgow, a tree, iii, 382. ---- ----, in Texas, silicified, xxxvii, 215. ---- ----, ----, part silicified and part bituminized, xxxvii, 216. ---- ----, in Virginia, i, 216. ---- ----, in West Indies, i, 56; _S. Hovey_, xxxv, 79. ---- ----, _W. M. Carpenter_ on, recently bituminized, xxxvi, 118.^f ---- ----, _Nicoll's_ sections, xxviii, 74. ---- ----, _H. Witham's_ sections and investigations, xxv, 108; xxvii, 415. ---- forest near Glasgow, xxix, 352. _Foster, A._, notice of the falls of Tockoa and Tallulah, in Georgia, xiv, 209. _Foster, J. W._, fossil mastodon, Crawford Co., Ohio, xxxvi, 189.^f _Foster, W._, easy method of filling a long syphon, xxviii, 268. ----, on the culture of the potato in France, xxvii, 176. Fountains, origin of, x, 394. _Fourier_, temperature of the terrestrial globe and planetary spaces, xxxii, 1. _Fowler, S._, minerals of Warwick, N. Y., ix, 242. _Fox, R. W._, questions on mineral veins, xxxiii, 135. ----, on the electro-magnetic properties of metalliferous veins, xx, 136. ----, on the changes in minerals by galvanism, xxxi, 373. _Fox, C._, some notice of British naturalists, xxxvi, 217. ----, notice of some American birds, xxix, 291.