Heat, absorption of, _Nobili_ and _Melloni_ on, xxiii, 188. ----, ----, apparatus for illustrating, _A. D. Bache_, xxviii, 320.^f ----, animal, vii, 200. ----, ----, influence of the nerves on, x, 390. ----, ----, _Nobili_ and _Melloni's_ experiments on insects, &c., xxiii, 185. ---- of different animals, x, 382. ----, capacity of gas for, iv, 372. ----, ---- of air, apparatus for illustrating, _R. Hare_, xiii, 5^f, 6.^f ----, cause of, _R. Hare_, iv, 142. ----, of combination, law of, _Andrews_, xlvi, 397. ----, conduction of, notice of _Despretz's_ investigations, v, 378. ----, ----, laws of, _Kelland_, xlii, 161. ----, ----, by water, _C. Dewey_, xxviii, 151. ----, connection of, with electricity and magnetism, _J. F. Dana_, vi, 163. ----, diathermancy of rock salt, _Melloni_, xl, 313. ----, of the earth, iv, 372. ----, ----, at different depths, xxiii, 14; xxxvii, 357. ----, ----, rate of increase downward, _A. De la Rive_ and _F. Marcet_, xxvii, 397. ----, ----, ibid, _L. Cordier_, xv, 116. ----, ----, detailed analysis of, _L. Cordier's_ essay upon, xv, 109. ----, ----, criticism of Poisson's view, _J. D. Forbes_, xl, 319. ----, ----, _G. Bischof_, xxxvii, 52. ----, ----, _W. Whewell_, xxix, 349. ----, ----, and of space, _Baron Fourier_, xxxii, 1. ----, ----, effects of internal and solar, on the temperature of the globe, xxxii, 1. ----, ----, in mines, _R. W. Fox_, xxxiv, 46. ----, effect of, on magnetism, _C. Matteucci_, xxii, 361. ----, ---- of long continued, on minerals, experiment to determine, _W. V. Harcourt_, xxix, 357. ----, ---- of, on some minerals or rocks in New York, _L. C. Beck_, xlv, 143; xlvi, 333. ----, moon's, xl, 315. ----, _Nobili_ and _Melloni's_ experiments on, xxiii, 185; xl, 313. ----, polarization of, xxviii, 366, 397. ----, polarized, and on his claims to the discovery of, _J. D. Forbes_, xl, 317. ----, production of, and of light, _J. L. Sullivan_, i, 91. ----, ----, from combustion, x, 382. ----, ----, 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. ----, ----, _Baron Fourier_, xxxii, 1. ----, specific, of gases, some of the laws of, xiii, 394. ----, ----, of certain solids, method of determining and calculating, _W. R. Johnson_, xxvii, 267. ----, sun's, _W. Whewell_, xxix, 349. ----, general views on, x, 78.