_Blake, J. H._, meteorological observations in 1840, at San Fernando, Cuba, xlii, 292. ----, coal mines of Cuba, xlii, 388. ----, geological and miscellaneous notices of the province of Tarapaca, xliv, 1.^f Blanc, Mt., journey up, _J. Van Rensselaer_, ii, 1. Blasting of rocks, danger and remedies, xvii, 132.^f ---- ----, an improved method of, by firing several blasts at once, with a Leyden jar, xvi, 372.^f ---- ----, by using as a plug, a cone of wood, _E. W. Blake_, xvii, 134.^f ---- ----, on the premature explosion of powder in, xix, 199. ---- ----, by galvanism, _R. Hare_, xxi, 139; xxvi, 352^f; xxxviii, 188. ---- ---- ----, _H. K. G. Morgan_, xxxviii, 33. Bleaching, remarks on, xv, 64. ---- oils, xlvii, 196. ---- powder, see _Chloride of lime_. Blende, in Canada, viii, 76. ----, in Connecticut, v, 41, 44; xxxiii, 162. ----, in Massachusetts, i, 437; vi, 201. ----, in N. Hampshire, xxxiv, 114. ----, in N. Jersey, v. 30. ----, in N. York, viii, 249; ix, 244. ----, western states, iii, 63. Blind, New England asylum for, xxiv, 175. Blind fish, from a cave in Ky., _J. Wyman_, xlv, 94. Blood, remarks on the circulating system, xxviii, 79. ----, rapidity of the circulation of, xvi, 388. ----, new mode of analyzing, _L. Figuier_, xlix, 201. ----, coloring matter of, xix, 381. ----, on the iron in, xv, 169. ----, manganese in, xxi, 370. ----, gases contained in, and on respiration, _G. Magnus_, xxxv, 198. ----, peculiar principle of, xviii, 148. ----, mode of preserving, xxi, 370. ---- of a dog, Filariæ in, xlv, 228. _Bloodgood, S. D._, on the Hudson and Mohawk railroad, xxi, 141. Blowing machinery of a furnace, investigations respecting, by _A. B. Quinby_, xii, 128. ---- ----, phenomenon exhibited by, xiii, 395; xiv, 395. ---- ----, ibid, explanation of, xv, 362.^f Blowpipe, common, _J. W. Bailey_, xxxii, 319.^f ----, simplified, xvii, 163. ----, mineral supports, ix, 201. ----, reaction of fluxes with metallic oxides, xxxii, 323. ----, new, _J. Green_, iv, 164.^f ----, alcoholic, improved, _R. Hare_, vii, 110.^f ----, compound, of _R. Hare_, i, 97; ii, 281.^f ----, ----, fusion of refractory substances by, iii, 87. ----, ----, hydrogen burned in water by, v, 347 _bis_. ----, ----, experiments with, on diamond, anthracite and graphite, vi, 349. ----, ----, mouth for, xxxv, 187. ----, ----, large mass of platina fused by, _R. Hare_, xxxiii, 195. ----, ----, a form of, xi, 142.^f ----, Clarke's, strictures on an account of, ii, 281.^f ----, hydrostatic, _R. Hare_, xi, 135.^f ----, chloro-hydrogen, xvii, 211. Boat, iron, iii, 371. Boiling point of water, different in vessels of different material, xlvii, 190. ---- ----, of liquids, ii, 361. Bog ore, see under _Iron ore_. Boletus igniarius analogous to animal substances, _A. Eaton_, vi, 177. Bolles's trigonometer, ix, 401.^f Bolton limestone quarry and its minerals, vii, 52.