—, E. Loomis, on the gyratory motion, xliii, 287, 291.
—, —, different character of the two sides, in the tornado of Mayfield, Feb. 1842, xliii, 285.
—, —, force of wind, ibid, xliii, 284.
—, —, effect of, in picking feathers of geese, xliii, 293.
—, —, character of gyration in small whirlwinds, xliii, 296.
—, —, causes of the storm of Dec. 1836, xl, 36.
—, —, limits, ibid, xl, 35.
—, —, effect on barometer, ibid, xl, 34.
—, J. P. Espy, on the nature of, xxxix, 120.
—, —, effect of heat in producing, xxxix, 120.