Araucanian races, remarks on, S. G. Morton, xxxviii, 341.f

Arch, some properties of a rampant, T. Gorton, xxvii, 303.f

Arches, method of describing curves for, J. Thomson, xxiv, 73.f

—, on tracing oval, E. Miller, xxii, 303.f

Archæologia Americana, iii, 357.

Archimedes, on the spiral of, by A. B. Quinby, ix, 316.f

Archimedes, a fossil coral, D. D. Owen, xliii, 19.f

Architecture, notes on, xxiv, 257.f

—, in the United States, xvii, 99, 249f; xviii, 11, 212.

—, Grecian style, the propriety of its application to modern uses, xviii, 218.