_Jackson, C. T._, analysis of mineral waters from the Azores, xxxi, 94, 96. ----, ---- of the serpentine marble of Vermont, xxxviii, 198. ----, ---- of meteoric iron from Claiborne, Alabama, xxxiv, 332; xlviii, 145. ----, ---- of Catlinite, xxxv, 388; xxxvii, 393. ----, composition of some kinds of grains, xlv, 339. ----, on the copper and silver of Kewenaw Point, Lake Superior, xlix, 81. ----, remarks on drift, xlv, 320. ----, geology and mineralogy of a part of Nova Scotia, xiv, 305^f; xv, 132^f, 201. ----, on certain portions of the geology of Maine, xxxiv, 69. ----, geological reports on Maine, noticed, xxxii, 193; xxxv, 387; xxxvi, 143; xxxvii, 376. ----, ---- ---- on N. Hampshire, xli, 383; xlviii, 393; xlix, 27. ----, on the geology of Maine and the public lands, review of, xxxvi, 143. ----, on geological specimens and surveys, xxx, 203. ----, notice of some metamorphic rocks in New Hampshire, xlv, 145. ----, organic matters in soils, xlv, 337. _Jacobi_, on electro-magnetism as a moving power, xl, 339. _Jameson's_ Mineralogy, announced, ii, 167. _Jarman, T._, on gas lights, iii, 170. Jasper in Canada, viii, 64. ---- in Connecticut, v, 36. ---- in Massachusetts, i, 113, 343. ---- in Mississippi valley, iii, 71. ---- in New Jersey, ii, 197. ---- in North Carolina, v, 261. Jaundice, use of phosphoric acid in, iv, 162. Java, native sulphur of, i, 58. ----, sulphuric acid of, i, 58. Jeffersonite, analysis of, v, 402. ----, identity of, with pyroxene, _H. Seybert_, vii, 145. _Jenyns, L._, notice of the works of, xxxvii, 165. Jewelry, composition of the powder used in giving the fine color to gold, xii, 188. _Johnson, E. F._, canal surveys in the state of New York, xxiv, 19.^f ----, on the height of the mountains of New York, xxxvii, 84. ----, on the present mode of conducting land surveys in the U. States, xix, 131. ----, on the epicycloid, xxi, 280.^f _Johnson, S. L._, ascent of Mt. Etna, xxvi, 1.