Boulders over the northern parts of England, _Prof. Phillips_, xxxi, 360. ----, ibid, _R. I. Murchison_, xxxi, 375. ----, and glaciers in Switzerland, _Agassiz_, xli, 59, 190. ----, of the North of Germany, xxviii, 389. ----, large, in Invernesshire, vi, 158. ----, and diluvial scratches, in the U. States, xli, 174. ----, in New England, their positions attributed to a retiring ocean, ix, 28. ----, in R. Island, _C. T. Jackson_, xl, 184. ----, in Maine, _C. T. Jackson_, xxxvi, 152. ----, in the Connecticut valley, vi, 85. ----, in western N. York, xxxvi, 39. ----, in New York, about the sources of the Hudson and to the southward, xxxiii, 304, 315. ----, on Long Island, xxxvi, 20. ----, of Labrador feldspar, near Pompton, N. J., v, 241. ----, of Ohio, D. and _I. A. Lapham_, xxii, 300. ----, in the valley of the Muskingum, xxix, 11. ----, in Illinois, xxxiv, 141. ----, in Indiana, _J. S. Plummer_, xliv, 296, 303. ----, of gneiss and granite on the Côteau des Prairies, _G. Catlin_, xxxviii, 142. ----, of the Canadian lakes and valley of the St. Lawrence, _C. Lyell_, xlvi, 314. ----, the origin of, remarks on, _P. Dobson_, x, 217. ----, _Murchison's_ citation of _Dobson's_ views on, xliii, 200. ----, transported by ice, in the polar current, _W. C. Redfield_, xxxii, 351. ----, on the supposed transportation of, _J. E. DeKay_, xiii, 348. ----, buoyancy of, at great depths, xxviii, 111. ----, gravel, &c., remarks on, _Sedgwick_, xxxiii, 287. ----, or erratic blocks, theory of, _B. Struder_, xxxvi, 326. ----, glacial theory of _Agassiz_, xlii, 352.^f ----, see farther under _Drift_ and _Scratches_. Boundaries of empires, affected by Physical Geography, xiv, 18; xvi, 99. _Bourne, A._, manufacture of glass for optical purposes, xl, 207. ----, prairies and barrens of the west, ii, 30. ----, presentation of shells to Yale College, xxxix, 195. ----, resistance of liquids, xxviii, 231. _Bourne, W. O._, Bergen Hill minerals, xl, 69. _Bowditch, N._, life and character of, _A. Young_, xxxv, 1.^f ----, obituary notice of, xxxiv, 220. ----, notice of, by the Duke of Sussex, xxxvi, 214. ----, list of the scientific papers of, xxxv, 46. ----, Mécanique Céleste, publication of, xxxv, 17. ----, Treatise on Navigation, by, origin of, xxxv, 9. _Bowdoin, J._, account of an irised aurora, xviii, 72. _Bowen, A. W._, Floral Calendar for 1826-7, as kept in Herkimer Co., N. Y., xvi, 48. _Bowen, G. T._, analysis of a siliceous hydrate of copper from New Jersey, viii, 118. ----, ---- the tungstate of lime, of Huntington, Ct., v, 118. ----, description and analysis of Sillimanite, viii, 113. ----, localities of spodumene in Massachusetts, viii, 121. ----, magnetic effects produced by _Hare's_ calorimoter, v, 357. _Bowman, J. E._, infusorial vegetable remains in England, xl, 174. _Boué_, geological journey, ix, 23.