Solidification of carbonic acid, xxxi, 163, 404; xxxv, 301, 346; xxxviii, 297^f; xlii, 203; xlix, 206.^f ---- of gases, _M. Faraday_, xlix, 373. Solorina saccata, xlv, 49. Solubility of magnesia, v, 378. Songs of birds, xxi, 164. Soot, analysis of, xi, 386. Sophora affinis, xlix, 130. Sopwith's mode of constructing secretaries, xxxv, 317. Sordawalite, x, 186. Sorex, see under _Zoology_. _Soubeiran, E._, action of chloride of lime on alcohol, xxiii, 134. ----, on the pulverization of calomel, xlvii, 193. Sound, concentration of, xix, 190. ----, limits to the audibility of, xxii, 374. ----, effect of, on the barometer, xxx, 377. ----, reverberation of, and best buildings for hearing, xxix, 350. ----, velocity of, vi, 394; xvi, 390. ----, waves of, apparatus for illustrating, xlix, 20.^f ----, subterranean, x, 377. ----, ----, at East Haddam, Ct., xxxix, 336. ----, influence of, on the elephant and lion, x, 186. Soundings, deep, in the ocean, by the French ship Venus, xl, 407. Soups from bones, in France, x, 388. South America, extracts from travels in, xxiv, 382. South Carolina, Medical Institution and Journal, xii, 382. ----, geological notices of, iii, 1, 227. South Seas, icebergs in, xxii, 200. Southampton lead mine, Massachusetts, i, 136; vi, 201; ix, 166; xii, 238^f; xxii, 57. Southern Review, notice of, xiii, 383; xiv, 199. ---- Agriculturalist, xviii, 203; xxi, 182. Space, planetary, _Fourier_ on the temperature of, xxxii, 1. ----, ----, _S. D. Poisson_ ibid, xxxiv, 57. ----, ----, idea of ether in, when introduced, xxxiii, 1. ----, ----, ibid, _R. W. Haskins_ on, xxxiii, 1. ----, resistance in, to the motion of the heavenly bodies, xvii, 389. Spadiate, a new mineral, xlix, 394. _Spafford, H. G._, on groves of evergreens, as screens for the garden, orchard, &c., xxii, 158. ----, on spontaneous combustion, xxii, 161. Spain, difficulty of mineralogical excursions in, viii, 187. ----, yield of Rio Tinto mine of copper, xxviii, 144. ----, mines of Almaden, xxviii, 21. ----, extracts from a journal, on the mining industry of, _F. Le Play_, xxviii, 17. ----, Madrid, science in, xix, 194. Spark extinguisher, xlii, 209.^f ----, electric, see _Electric_. Sparks in the freezing of water by ether, _Pontus_, xxvi, 178. Sparrows, number of caterpillars taken by, ix, 200. Spatangus, see ZOOLOGY, _Radiata_. Spathic iron, see _Iron, carbonate of_.