—, principles of aerial navigation, H. Strait, xxv, 15.f
—, a means of making meteorological observations, xlii, 150.
—, observations during an ascent of, by Eugene Robertson, xii, 166, 325.
Banks, J., herbarium of, xl, 9.
Bare Hills, Maryland, H. H. Hayden, xxiv, 349.f
Barium, extrication of, R. Hare, xxxvii, 267; xxxviii, 115; xxxix, 362.
—, method of preparing the deutoxide of, xvi, 395.
Bark, Peruvian, experiments on, by G. W. Carpenter, ix, 363.
Barlow, P., instruments for illustrating the effects of electro-magnetism, v, 396.f
Barnard, F. A. P., aurora borealis of Nov. 14, 1837, xxxiv, 267.