_Harlan, R._, Arvicola ferrugineus, x, 285. ----, Batracian reptiles, new, with observations on the larvæ of frogs, x, 53. ----, bones from near the mouth of the Mississippi, xiv, 186. ----, lizards, orbicular, notice of, xxxi, 383. ----, mammalia, fossil, from the Brunswick canal, Georgia, xliii, 141.^f ----, mouse, new species of, xxxi, 385. ----, Orycterotherium, xlii, 392; xliv, 69.^f ----, Salamandra pennsylvanica, x, 286. ----, tortoise, freshwater, xxxi, 382.^f ----, Medical and Physical Researches of, noticed, xxx, 188. ----, new fossil mammalia of, _R. Owen_ on, xliv, 341. ----, ibid, in reply to R. Owen, xlv, 208. _Harris, W. S._, utility of lightning conductors on ships, xxi, 347. ----, meteorological observations at Plymouth, xliii, 369. _Harris, T. W._, North American Sphinges, xxxvi, 282. ----, Report on Insects injurious to vegetation, noticed, xliii, 386. Hariz, Europe, notices of, _T. G. Clemson_, xix, 105.^f _Haskins, R. W._, examination of the theory of a resisting medium in space, xxxiii, 1. ----, Astronomy of, noticed, xli, 389. _Hassler, F. R._, methods and plans of, in the survey of the coast of the United States, xvi, 225. ----, repeating theodolite, description of, _C. Wilkes_, U.S.N., xvi, 252.^f Hats, manufacture of, x, 193. Hawaii, see _Sandwich Islands_. _Hawkins'_ Saurian remains purchased, xxix, 367. Hay, siliceous glass from burning, xix, 395; xxiv, 174. _Hayden, C. B._, analysis of the Scott spring, Va., xliv, 409. ----, on the ice mountain of Hampshire Co., Va., xlv, 78.^f ----, on the rock-salt and salines of the Holston, Va., xliv, 173. _Hayden, H. H._, Geological Essays of, noticed, iii, 47. ----, on the Bare Hills, near Baltimore, xxiv, 349.^f ----, notices of the geology of the country near Bedford springs, Pennsylvania, xix, 97. Haydenite, description of, xlvi, 379.^f ----, analysis, by _B. Silliman, Jr._, xlvi, 380. _Hayes, A. A._, chlorine, carbon and hydrogen, two new compounds of, xxii, 141. ----, chromium, combinations of, xiv, 136. ----, columbic acid, investigations on, xlvi, 166. ----, dewpoint, remarks on, xviii, 63. ----, hygrometer, portable, xvii, 351.^f ----, meteoric iron, Alabama, xlviii, 147. ----, microlite and pyrochlore, identity of, xliii, 33; xlvi, 158. ----, tin, action of metallic, on the muriate of, xxxviii, 408. ----, Tarapaca saline minerals, nitrates, iodates, borates, xxxviii, 410. _Hayes, G. E._, geology of western New York, with remarks on the causes of its topographical features, xxxi, 241; xxxv, 86.^f _Hayes, J. L._, on the geographical distribution and phenomena of volcanoes, xlvii, 127. ----, influence of icebergs upon drift, xlv, 316, 326. _Haymond, R._, on remains of Megatherium and Mastodon, xlvi, 294. _Hazard, R. G._, method of describing a hyperbola, xxi, 314.^f