—, coralline, in the West Indies, i, 141.
Agave plant, and cordage from its fibre, xxi, 32.
— and other plants used for cordage, J. Mease and H. Perrine, xxv, 330.
Agricultural chemistry, remarks on, xli, 262.
Agriculture, rotation of crops in, M. Macaire, xxiii, 138.
Aikin, W. E. A., notices of the country between Baltimore and the Ohio river, xxvi, 219.f
—, apparent diminution of weight in some circumstances, xxvii, 224.
Air, on the color of, by Count Xavier de Maistre, xxvi, 65.
—, currents in, see [Winds].
—, temperature of, see [Meteorology], [Heat] and [Temperature].