—, ibid F. Alger's, xlvii, 333.
—, ibid J. D. Dana's, xxxii, 387; xlvi, 362.f
Mining company, the Muskingum, xxv, 224.
— industry of Spain, F. le Play, xxviii, 17.
Mint, projected branch, of North Carolina, xx, 401.
—, gold coinage, amount of, in the United Stales, xx, 403.
—, amount of gold deposited at, xx, 404.
Mirror, metallic, found by the precipitation of silver from the oxide, xlix, 398.
Mississippi, mounds of, R. C. Taylor, xxxiv, 97.
— valley, L. Bringier, iii, 15;