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.
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