—, ibid, W. H. Weekes, xliii, 395.
—, not produced by galvanism, xxxiii, 272; xlix, 227.
Inspiration of inflammable gas, xiv, 370.
[Institute,] Albany, transactions of, noticed, xvii, 208, 415; xix, 173, 360.
—, Mechanic's, New York, notice of proceedings, xxxi, 415.
—, National, a society established at Washington, xli, 203.
Interest, new mode of computing, G. R. Perkins, xlvii, 51.
Interference of light, new case of, Powell, xxxviii, 107.
— —, apparatus for experiments on, E. S. Snell, xlix, 26.f
Iodate of soda, iodate of magnesia, and a borate, &c., Tarapaca, A. A. Hayes, xxxviii, 410; xxxix, 378; xliv, 6.