_Deshayes_, Tertiary Fossils, _Cuvier_ and _Brongniart's_ report on, xxiii, 196. _Desmarest, A. G._, notice of, xxxvii, 124. _Despretz, C._, on crystallizable acetic acid, xxvii, 197. Detection of adulterations in alcohol, xix, 71. ---- ---- in ammonia, xix, 72. ---- ---- in arrow root, xix, 72. ---- ---- in calomel, xix, 72. ---- ---- in castor oil, xix, 77. ---- ---- in chromate of lead, xix, 73. ---- ---- in copaiva, xix, 73. ---- ---- in iodide of potassium, xix, 74. ---- ---- in lemon juice, xix, 75. ---- ---- in morphine, xix, 75. ---- ---- in oil of sweet almonds, xix, 76. ---- ---- ----, of olives, xix, 76. ---- ---- in peroxide of manganese, xix, 78. ---- ---- in Peruvian bark, xix, 81. ---- ---- in phosphate of soda, xix, 82. ---- ---- in prussic acid, xix, 70. ---- ---- in soda, xix, 83. ---- ---- in sulphate of magnesia, xix, 84. ---- ---- in sulphate of quinine, xix, 84. ---- ---- in tartrate of potash, xix, 85. ---- ---- in tartar emetic, xix, 86. ---- ---- in vinegar, xix, 86. ---- of arsenic, iii, 354; iv, 155; xliv, 213. ---- ----, _L. Feuchtwanger_ on, xix, 339.^f ---- ----, _Riench's_ mode, xliv, 240. ---- ----, _J. L. Smith_ on, xl, 278; xlii, 75.^f Devonshire, structure of, _Sedgwick_ and _Murchison_, xxxi, 349^f; xxxiii, 85. ----, lines of dislocation in, _De la Beche_, xxi, 354. Dewpoint, remarks on, _A. A. Hayes_, xviii, 63. _Dewey, C._, aurora borealis at Rochester, N.Y., July, 1837, xxxiii, 143. ----, ---- ---- of Sept., 1839, xxxviii, 146. ----, an early autumn indicated by the indigenous plants which blossom late, ii, 255. ----, on making meteorological observations, xi, 59. ----, sunsets in the west, xxxviii, 151; xlii, 200. ----, temperature of Lake Ontario, xxxvii, 242. ----, caricography by, vii, 264; viii, 93, 264; ix, 60, 257; x, 30, 265; xi, 147, 304; xii, 296; xiv, 351; xxv, 140; xxvi, 107, 376; xxvii, 236; xxviii, 270; xxix, 245; xxx, 59; xxxix, 50; xliii, 90; xlviii, 140; xlix, 42. ----, carices in the herbarium of Muhlenberg, xxv, 143. ----, ---- collected in Arctic America, xxvii, 240. ----, on the conduction of water, xxviii, 151; xxxi, 266. ----, on crystallized steatite, and ores of iron and manganese, v, 249. ----, hydrargillite, iii, 239. ----, Wavellite, from Richmond, Mass., ii, 249; iii, 239. ----, analyses of argentine and crystallized steatite, vi, 333. ----, mineralogy and geology of Williamstown, Mass., i, 337. ----, geology and mineralogy of part of Massachusetts, and some portions of the adjoining states, viii, 1^f, 240. ----, geological section from Taconick range in Williamstown, to Troy, ii, 246. ----, notice of the flexible or elastic marble of Berkshire Co., Mass., ix, 241. ----, on the polished limestone of Rochester, xxxvii, 240. ----, striæ and furrows of the polished rocks of western N. York, xliv, 146. ----, singular conformation of limestone, ix, 19.^f