Baker, G., vibrations of a mercurial pendulum, xlviii, 156.
Baking, a machine for accelerating fermentation of flour, ix, 198.
Balance, application of the principle of, to milking, churning, &c., H. Strait, xxvii, 92.f
Balance beam, Patten's, ix, 92.f
Balande's collections of objects in natural history in Africa, iv, 373.
Baldwin, Wm., two new species of Rottböllia, i, 355.
Ball, J., remarks upon the geology and features of the country west of the Rocky Mountains, xxviii, 1.
Ball's cave, Schoharie, notice of, xxvii, 368.
Balloon with rarefied air, xii, 372.
—, effect of solar heat in raising, J. Rae, xxxiii, 196.