—, —, by compression of glass, xx, 180.
—, —, by friction, cause of, J. T. Watson, viii, 276.
—, —, by combination with oxygen, different for different substances, and amount of, xv, 392.
—, radiated, influence of color on, A. D. Bache, xxx, 16; xxxiv, 39.
—, —, transmission and refraction of, Melloni, xxvii, 228; xl, 313.
—, — —, J. D. Forbes, xl, 315;
refraction of, xxviii, 366.
—, radiation of, apparatus for illustrating, A. D. Bache, xxviii, 320.f
—, —, Powell's report on, noticed, xl, 313.
—, of space, W. Whewell, xxix, 349.