Ichthyosauri, T. Hawkins, xxvii, 413.
Iconography, xxxiii, 184.
Ideler, J. L., views of, on meteorites, shooting stars and Auroras, xxviii, 288.
[Idocrase,] analysis of, T. Richardson, xxxviii, 120.
—, of Skye, xxviii, 395.
—, American, first detected, W. Meade, vii, 50.
—, crystal, from Amherst, N. H., xlvi, 381.f
—, in Connecticut, ix, 44.
—, in Massachusetts, viii, 44; x, 11.
—, in N. York, xvii, 145; xxi, 327; xlvi, 35.