—, soil of, J. T. Plummer, xl, 198; xliv, 310.
—, mounds of, J. T. Plummer, xliv, 313.
Indigo, J. Dalton's mode of testing the value of, ix, 385.
—, analysis of, xviii, 241.
—, mode of assaying, S. L. Dana, xlii, 320.
—, on the manufacture of, in the U. States, W. Partridge, xviii, 237.
Induction, electrical, see [Electrical.]
Inertia, remarks on, Z., xiv, 50.
Infinites, on, I. Orr, v, 326.
[Infusoria,] Turpin, on siliceous, xxxii, 400.