_Bigsby, J, J._, on the environs of Carthage bridge near the mouth of the Genesee river, ii, 250.^f ----, geology and mineralogy of the N. W. portion of Lake Huron, iii, 254. ----, outline of the mineralogy and geology of Malbay, L. C., v, 205.^f ----, minerals and organic remains in Canada, viii, 60. Bile, analysis of, xviii, 162. ----, test for, _M. Pettenkoffer_, xlix, 206. _Binney, A._, climate of the post-pleiocene period of the U. States, xlvii, 259. Binomial theorem, demonstration of, _T. Strong_, xii, 132. ---- ----, _D. Gould_, xix, 50. _Biot_, optical properties of saccharine juices, xxiv, 379. ----, views on auroras, xxv, 357. Biotine, xi, 264,^f [anorthite.] Birch, white, chemical examination of the bark of, _O. Mason_, xx, 282. Birds, songs of, innate, xxi, 164. ----, remarks on the notes of, x, 390. ----, gigantic struthoid from New Zealand, xliv, 417; xlv, 185; xlviii, 194; xlix, 219, 403. ---- of N. America, on the migration of, _J. Bachman_, xxx, 81. ----, see farther under _Zoology_. ---- nests, large, of New Holland, xlvii, 217, 312; xlviii, 61. ---- tracks, see _Footprints_. Births of male and female children, comparative number of, in France, xiv, 372. _Bischof, G._, natural history of volcanoes and earthquakes, xxxvi, 230^f; xxxvii, 41.^f ----, elevations from earthquakes, xxxvi, 273; xxxvii, 49. Bismuth, native, Huntington, Ct., i, 316; vi, 210. ----, expansion of, on cooling, xxi, 371. ----, new sulphurets of, _W. W. Mather_, xxiv, 189, 196. ----, disulphuret of, _W. W. Mather_, xxvii, 264. ----, fusible alloy of, xxi, 371. ----, carbonate of, analysis of, xviii, 391. ---- cobalt ore, analysis of, xiii, 187. Bitter-spar, in Massachusetts, i, 137, 343; ii, 236. ----, in Maryland, v, 256. ----, in R. Island, iv, 285. ----, in Vermont, v, 272; xvii, 353. Bitterness of vegetables, _M. Guillemin_, xxiv, 273. Bitumen in stones, xii, 147. ---- or petroleum oil spring of Allegany Co., N. Y., xxiii, 97. ---- in the valley of the Little Kenawha, xxix, 86; valley of the Kenawha, 121; of Sandy river, 129. ---- in N. Jersey, xxxvi, 114. ---- from Barbadoes, v, 406. ---- of Africa, i, 147. ----, elastic, of France and England, xiv, 371. Bituminized wood in the recent era, _W. M. Carpenter_, xxxv, 345; xxxvi, 118.^f ---- ----, partly silicified, Texas, xxxvii, 216. Bituminous or organic matter in the N. York limestones, _L. C. Beck_, xlv, 335. ---- coal; see _Coal_. Black lead; see _Graphite_. Black mountain, Vt., geology of, vi, 7. Black sea, anal. of waters of, xx, 188. ---- ----, height of, above the Caspian, xl, 320. ---- ----, on the shores of, xxxii, 399. Blacking, preparation of, xiii, 163. Blagden, Sir Charles, obituary notice of, ii, 344. _Blake, E. W._, on the forms of cog-wheels, vii, 86.^f ----, blasting rocks, xvii, 134.^f ----, theory of the resistance of fluids, xxix, 274; xxx, 359.