_Scoresby, W._, magnetical investigations, xlviii, 33. ----, improvements by, in magnetic apparatus, xxxiv, 398. Scotacks, tribe of, in Hungary, v, 384. Scotland, population of, xxiv, 211. Scott spring, Virginia, analysis of, xliv, 409. Scratches, diluvial, caused by ice, according to _L. Agassiz's_ theory, xlii, 350. ----, ----, theory of, _E. Hitchcock_, xli, 255. ----, ----, in the United States, xli, 174. ----, ----, ----, belong to two systems, _W. C. Redfield_, xlv, 333. ----, ---- ----, on rocks, a few localities of, xvii, 408. ----, ----, in Maine, _C. T. Jackson_, xxxvi, 153. ----, ----, in New Hampshire, _O. P. Hubbard_, xxxiv, 107. ----, ----, ----, _C. T. Jackson_, xlv, 146. ----, ----, ----, on the rocks at Hebron, xxii, 166. ----, ----, in western New York, _G. E. Hayes_, xxxv, 191. ----, ----, ----, xxxvi, 39. ----, ----, ibid, _C. Dewey_, xliv, 146. ----, ----, on the rocks near New York city, _J. E. Dekay_, xvi, 357. ----, ----, on the rocks, in Sullivan Co., N. Y., _W. A. Thompson_, xxiii, 243. ----, ----, in Pennsylvania, _H. D. Rogers_, xliii, 180. ----, ----, in Ohio, (?) at Sandusky Bay, vi, 179. ----, ----, in Indiana, _J. T. Plummer_, xliv, 296. ----, ----, in the rocks of the Allegany range, xx, 124. Screws, manufacture of, in Connecticut, ii, 208. _Scrope, G. P._, on Volcanoes, review of, xiii, 106. ----, letter to the editor on volcanoes in North America, xiii, 190. ----, descriptive arrangement of volcanic rocks, xv, 28. Sculpture, by Canova, iv, 371, 389. Sea and land, relative level of, as regards the tides, xxxi, 335. ----, waves, currents and tides, v, 131. ----, ----, ----, see farther under _Ocean_. ----, depth of, v, 130. ----, ----, not determinable by the echo, _C. Bonnycastle_, xxxviii, 161. ----, deep soundings in, by the French ship Venus, xl, 407. ----, encroachments of, near New York, xxxvi, 16. ----, action of, xxi, 21. ---- and land breezes, causes of, _W. C. Redfield_, xxxiii, 65. ----, remarkable agitations of, at the Sandwich Islands, _T. C. B. Rooke_, xxxvii, 358. ----, Dead, level of, xl, 213; xlii, 214. ----, ----, analysis of the waters of, xiii, 395; xlviii, 10. ----, ----, account of, _J. D. Sherwood_, xlviii, 1. Sea-serpent, remarks concerning, _J. Bigelow_, ii, 147. ----, xi, 196. ----, on the existence of, xii, 375. ----, xxviii, 372. Sea-serpentism, history of, _S. L. Mitchill_, xv, 351. _Seal, T._, on beryl, iv, 39. Sealing wax, method of making, xxi, 150. ---- ----, improvement in, xxviii, 148. ---- ----, mode of separating from old letters, xxiii, 200.