—, —, large mass of, found in N. Carolina, ix, 9.
—, —, large masses of, in Virginia, B. Silliman, xxxii, 101.
—, —, table showing the amount yielded by mines, xx, 401.
—, —, containing rhodium, from Mexico, xi, 298.
— coins, wear and tear of, throughout the world, xx, 402.
— coinage, in the United States, amount of, xx, 403.
— leaf, the blue color of transmitted light, Dupasquier, xlix, 391.
— —, adhering through electrical attraction, v, 198.
Goniometer, reflecting, improvement suggested by A. Eaton, xx, 158.
—, —, simplification of Wollaston's, R. Graves, xxiii, 75.f