Kyanite, analysis by _C. H. Rockwell_, xlvi, 383. ----, compared crystallographically with Sillimanite, _C. U. Shepard_, xii, 159.^f ----, in Connecticut, i, 352; ii, 238; vi, 219; vii, 253; xviii, 361. ----, in Massachusetts, i, 114; vi, 219; vii, 255; ix, 252; xiv, 216. ----, in New Hampshire, v, 40. ----, in New York, vi, 364. ----, in Pennsylvania, v, 41; ix, 246; x, 220, 222; xiv, 8, 12, 14, 18. ----, in Rhode Island, v, 403. ----, in Vermont, vi, 219, 245, 249. L. Laboratory of Dr. Hare, description of, xix, 26.^f Labradorite of Essex Co., N. Y., _W. C. Redfield_, xxxiii, 303. ----, in Canada, viii, 66. Lachrymatories from Milo, xvi, 333.^f Lacker for brass, receipt for, ix, 169. _Lagrange, J. L._, works and life of, notice of, xxx, 64; xxxi, 97. ---- formulæ for determining the motions of any systems of bodies about a state of equilibrium, correction of an error in, _H. J. A._, xi, 398. Lakes, North American, origin of, _J. B. Gibson_, xxix, 208. ----, ---- ----, action of, _H. Schoolcraft_, xliv, 368;--drift sand deposits, 369. ----, ---- ----, raised beaches of, _C. Lyell_, xlvi, 314. ----, ---- ----, on the changes of level, _H. A. S. Dearborn_, xvi, 78.^f ----, ---- ----, dimensions of, xlvii, 21. ----, ---- ----, influence of, on climate, xlvii, 21. ----, ---- ----, remarks on the supposed tides of, _H. Whiting_, xx, 205. ----, ---- ----, tides in, _D. Ruggles_, xlv, 18. ----, bursting of, through mountains, iii, 252. ----, ancient, along the Connecticut valley, vii, 16. Lake, Chautauque, height of, above the sea, xlv, 17. ---- Erie, coast of, xxix, 204. ---- ----, degradation on, xxxiv, 349. ----, on the eruption of Long and Mud Lake, Vt., _S. E. Dwight_, xi, 39.^f ---- of the Highlands, N. Y., v, 32. ---- Huron, account of, and of fossils about, iii, 254^f, 270^f, 271.^f ---- Ontario, beaches of, and height, xxxvi, 43. ---- ----, height of, above tide level, depth and temperature, xxxiii, 403. ---- ----, _C. Dewey_, xxxvii, 242. ---- of the Woods, position of, determined astronomically, by _J. L. Tiarks_, xv, 41. _Lalande_, medals founded by, xxv, 190. Lamp, aphlogistic, iv, 328.^f ----, ----, platina, xx, 385. ----, new astral, v, 386. ----, hydrostatic, xvii, 161. ----, a new, with inflammable air, _J. Green_, ii, 330.^f ----, new, without flame, i, 207. ----, monochromatic, of _D. Brewster_, vii, 363. ----, oil gas, xxii, 387. ----, portable gas, iii, 371. ----, Rumford, xix, 40. ----, voltaic, _J. Cutbush_, ii, 332. ---- black, analysis of, xi, 387. ---- glasses, to prevent the cracking of, xxi, 165. Land and water, distribution of, xiv, 375. Land surveys in the U. States, present mode of conducting, xix, 131. Languages, _F. Adelung's_ work on, iii, 376. ----, number of, on the earth, x, 383. ---- of signs, observations on, _S. Akerly_, viii, 348.