— —, condensation of, M. Faraday, vii, 354.

— —, liquid, properties of, M. Thilorier, xxxi, 402.

— —, solidification of, M. Thilorier, xxxi, 163, 404.

— —, —, J. Torrey, xxxv, 374.

— —, liquefaction and solidification, and apparatus for, figured, J. K. Mitchell, xxxv, 346.f

— —, apparatus for solidifying, J. Johnston, xxxviii, 297f; xlii, 203.

— —, —, —, R. Addams, xxxv, 301.

— —, new instrument for solidifying, E. N. Horsford, xlix, 206.f

— —, heat from solid, xlvi, 215.

— oxyd, mode of preparing, xiii, 186.