Part 20

Lead, sheet, Chinese process of making, vii, 391. ----, on the use of the hot blast in smelting, xlii, 169.^f ----, action of water on, xxxiv, 25; xlvi, 398. ---- in sulphuric acid, test for, xvii, 195. ----, sulphate of, action of some alkaline salts on, _J. L. Smith_, xlvii, 81. ----, tartrate of, a pyrophorus, ix, 207. ----, native, in Europe, x, 191. ---- mines of the Hartz, xix, 113. ---- ---- of the United States, proceeds from, x, 398. ---- ---- of the West, _J. Locke_, xliii, 147. ---- ---- of the West, remarks on the position and origin of, xlvii, 106. ---- ----, rock of, of the West, identical with the Niagara limestone, _J. Hall_, xlii, 59. ---- ---- of Lubec, in Maine, xxx, 332. ---- ---- of Massachusetts, ix, 166; xxii, 56. ---- ---- of Hampshire Co., Mass., notices of, _A. Nash_, xii, 238.^f ---- ---- of Southampton, Mass., i, 136; vi, 201. ---- ---- of Whately and Leverett, Mass., vi, 204. ---- ---- of Middletown and Bethlehem, Ct., vi, 205. ---- ---- and ores in New York, xlvi, 28. ---- ---- at Ancram, New York, notice of, _C. A. Lee_, viii, 247. ---- ---- of northern New York, xxxvi, 24. ---- ---- and ores of Davidson Co., N. C., xli, 183, 348. ---- region of Missouri, _H. R. Schoolcraft_, iii, 248. ---- ---- and ores of Missouri, _Troost_ and _Lesueur_, xii, 379. ---- ---- of Missouri, _J. N. Nicollet_, xlv, 340. ---- ---- of La Motte, the ore of, not argentiferous, xliii, 64. ---- ---- of the upper Mississippi, notice of Chandler's map of, xvii, 416. ---- ---- of Wisconsin and Missouri, _J. T. Hodge_, xliii, 35.^f ---- ---- of Wisconsin, and mode of working, _J. T. Hodge_, xliii, 41.^f ---- ores, observations on, iii, 176. ---- ----, price of, and of lead in Wisconsin, xliii, 72. ---- ---- of the La Motte mine, Mo., not argentiferous, xliii, 64. ----, native carbonate of, Davidson Co., N. C., analysis of, xli, 183, 348. ----, ---- ----, in Massachusetts, vi, 201; ix, 249. ----, ---- ----, in Missouri, xii, 379. ----, ---- ----, in Wythe Co., Va., xliii, 169. ----, ---- chloride of, in Massachusetts, vi, 201. ----, ---- native cupreous sulphato-carbonate of, iv, 29. ----, ---- diarseniate of, _T. Thomson_, xxxv, 297. ----, ---- molybdate of, in Massachusetts, vi, 201. ----, ---- ----, in New York, viii, 249. ----, ---- red and yellow oxide of, in Wythe Co., Va., xliii, 169. ----, ---- phosphate of, in Massachusetts, vi, 201. ----, ---- ----, in North Carolina, xli, 183, 348. ----, ---- sulphato-carbonate of, iv, 29. ----, ---- sulphato-tri-carbonate of, iv, 29. ----, ---- sulphuret of, (Galena) crystals, distorted, from Rossie, xlvii, 417. ----, ---- ----, argentiferous ore of Lane's mine, analysis of silver from, _W. W. Mather_, xxvii, 256. ----, ---- ----, in Canada, viii, 76. ----, ---- ----, in Connecticut, i, 316; iii, 173; v, 44^f; xxvii, 256; xxxiii, 162. ----, ---- ----, in Maine, xxx, 332. ----, ---- ----, in Massachusetts, i, 115, 137, 343, 437; vi, 201, 204; viii, 57; xii, 251; xxii, 56. ----, ---- ----, in Missouri and the West, see above, under _Lead Mines_. ----, ---- ----, in New Hampshire, vi, 245; viii, 235; xxxiv, 114. ----, ---- ----, in New York, v, 21, 30; vii, 254; viii, 260; xxv, 350; xl, 76; xlvii, 417. ----, ---- ----, in Rhode Island, viii, 231. ----, ---- ----, in Tennessee, i, 63. ----, ---- ----, in Virginia, i, 63; xliii, 169. ---- pipes, strength of, xii, 189; xiv, 369. ----, ---- used as an aqueduct, hydrogen in, _N. Walkly_, xxxiv, 393. ----, ----, Ewbank's tinned, notice of, xxvi, 210. ----, ----, protected by tin, safety of, xxvi, 400. ----, and tin, combustion of the alloy of, xxi, 375. ----, pots, manufacture of, by Messrs. Dixon, xxi, 196.

Leafing of plants, xliv, 419.

Leather, fabrication of Russian, iv, 193.

_Leavenworth, M. C._, four new plants from Alabama, vii, 61. ----, list of the rarer plants of Alabama, ix, 74. ----, description of the Tullia pycnanthemoides, xx, 343.^f ----, on some new species of plants, xlix, 127.

Lebanon, Mt., coal mine of, xxviii, 32.

Lederer's cabinet of minerals for sale, xxix, 392.

Ledererite, supposed new mineral, _C. T. Jackson_ and _A. A. Hayes_, xxv, 78^f, 80. ----, description of, xlvii, 339, 350.

Lederite, a supposed new mineral species, _C. U. Shepard_, xxxix, 357^f; xlviii, 176. ----, of Shepard identical with Sphene, xlvi, 36.^f ----, identical with Sphene, _B. Silliman, Jr.,_ xlviii, 180. ----, measurements of, by _J. D. Dana_, xlviii, 180.

_Lee, C. A._, sketch of the geology and mineralogy of Salisbury, Ct., viii, 252. ----, notice of the Ancram lead mine, viii, 247.

Leech, account of, x, 389; xxiv, 160.

Leeches, mortality of, during storms, xvii, 186.

_Leedom, E. C._, an astronomical machine, xlii, 338.^f Leghorn hats, on the cultivation of the material for, xxii, 363.

Leguminous fruits, flour or meal from, vii, 189.

_Leibnitz, G. W. von_, notice of life of, xlix, 187. ----, Protogæa of, or his views on the formation of the earth, xx, 56; xxxix, 15.

Leipsic fair, notice of, iv, 392; vii, 381; xxiii, 182.

_Leitner, E. T._, on double flowers, xxiii, 45.

Lens, crystalline, of animals, how preserved for future examination, xxvi, 216.

_Lenz_ on the saltness of the ocean at different depths, xxiii, 10.

Lepidanche, new genus, _G. Engelmann_, xliii, 343. ----, appressa, xlv, 77. ----, compositarum, xliii, 344^f; xlv, 77.

Lepidolite, analysis of, _Gmelin_, ix, 329. ----, in Maine, x, 16; xviii, 293. ----, in Massachusetts, i, 350.

_Lester, W._, geological map of New London and Windham Cos., Ct., xxiii, 404.

Level of the Dead Sea, barometrical observations made to determine, xlii, 214. ----, difference of, between the Black and Caspian Seas, xl, 320. ----, change of, during earthquakes in Calabria, Chile, Scandinavia, Finland, &c., _G. Bischof_, xxxvi, 273. ----, ----, various examples of, _W. W. Mather_, xlix, 294. ----, ----, in Chile, xxviii, 236. ----, ----, ----, and elsewhere in S. America, _C. Darwin_, xxxiii, 100. ----, ----, at Ceylon, vi, 194. ----, ----, in Great Britain, xxxiii, 97; xxxiv, 27. ----, ----, about the North American Lakes, _C. Lyell_, xlvi, 314. ----, ----, about Lake Huron, indicated by ancient beaches, iii, 257. ----, ----, about Lake Ontario, ibid, _G. E. Hayes_, xxxv, 104. ----, ----, in Maine, _C. T. Jackson_, xxxvi, 154. ----, ----, in New York, about Canaan mountain, v, 15. ----, ----, ----, in the Mohawk valley, xxxvi, 31. ----, ----, in Palestine, _J. D. Sherwood_, xlviii, 15. ----, ----, on the Scandinavian coast, _L. Beamish_, xlvii, 184. ----, ----, in Sweden, _C. Lyell_, xxviii, 72, 387. ----, ----, in United States and California during the tertiary epoch, _T. A. Conrad_, xxxv, 245. ----, causes of changes of, _G. Bischof,_ xxxvi, 278. ----, ---- ibid, _W. W. Mather_, xlix, 284. ----, ---- ibid, _H. D._ and _W. B. Rogers_, xliv, 360.

_Lewis, J. A._, Kenawha gas, xlix, 209.

_Lewis, W. J._, involution of polynomials, xlii, 239.

Lexicography, contributions to English, _J. W. Gibbs_, xxxiii, 324; xli, 28, 32; xlv, 96.

Leyden jar, effect of freezing water in, viii, 374. ---- ----, on the discharge of, xxxviii, 6.

_Lezch, J. U._, volatile acids of butter, xlix, 202.

Lias of the west, _S. P. Hildreth_, xxx, 395.

Liatris flexuosa, xxxvii, 388.^f ---- fruticosa, v, 299. ---- oppositifolia, v, 299. ---- scariosa, iv, 67. ---- squarrosa, iv, 66.

Library, Royal, at Paris, size of, viii, 376. ---- of Yale College, donation to, from England, xxvii, 184.

Libraries of the world, comparative table of, xxxi, 178. ----, circulating, in England, v, 175. ---- of St. Petersburg, v, 177.

Lichen rocella, coloring matter of, xviii, 151.

_Liebig, J._, on creosote, xxviii, 131. ---- and _Wöhler_, on the radical of benzoic acid, xxvi, 261.^f ----, on bitter almond oil, xxvi, 263.

Life, on the functions of vegetable, _G. T. Burnett_, xxi, 153. ----, mean term of, among the Romans, xvii, 188. ----, mean term of, in France and England, xvii, 188. ----, probability of, from registers kept at Geneva, xv, 187. ---- of a molluscous animal, singular preservation of, xxviii, 355. ---- apparatus, notice of _Murray's_, xxviii, 70. ---- preservers, xiv, 189.

Light and heat, _S. Morey_, ii, 118, 122. ---- and magnetism, connexion between, _G. Gibbs_, i, 89. ----, observations and experiments on, _S. Adams_, xlii, 123. ----, absorption of, by the atmosphere, xlvi, 201. ----, action of, chemical, xvii, 376. ----, ----, in producing chemical changes, _J. W. Döbereiner_, xxii, 352. ----, ----, in decomposing carbonic acid and alkaline carbonates, _J. W. Draper_, xlvi, 398. ----, ----, on the color and movement of plants, _D. P. Gardner_, xlvi, 1.^f ----, ----, on an elementary substance, producing, as supposed, a change, _J. W. Draper_, xlvi, 390. ----, ----, on an iodized silver plate, producing electricity, xlvii, 190. ----, ---- of solar spectrum, chemical, xxxi, 260. ----, ---- ---- ----, on sensitive paper, _J. F. W. Herschel_, xxxviii, 110. ----, ---- of gaseous and other media on the solar spectrum, xlii, 157. ----, blanching effects of, obviated, xxxv, 338. ----, halo of, which surrounds all bodies, _Mary Griffith_, xxxviii, 22. ----, influence of, on germination, _R. Hunt_, xliv, 352. ----, ----, on the growth of plants, xliv, 352; xlvi, 397. ----, intensity of, how measured, xv, 184. ----, new case of interference of, _Powell_, xxxviii, 107. ----, apparatus for experiments on inflection and interference of, _E. S. Snell_, xlix, 26.^f ----, latent, _J. W. Draper_, xliv, 202. ---- lines seen at regular intervals, a new property, _D. Brewster_, xxxiv, 20. ----, magnetic influence of the violet ray of, xviii, 171. ----, ---- ---- of the solar rays, xiii, 188. ----, on the deflection of, xviii, 176. ----, monochromatic, for microscopic observations, xiii, 190. ----, oxy-hydrogen, for light-houses, improvement in, by use of sulphate of lime, xxviii, 355. ----, a new kind of polarity in homogeneous, _D. Brewster_, xxxv, 292. ----, polarization of, by reflection, _D. Brewster_, xxii, 277.^f ----, ----, by refraction, laws of, _D. Brewster_, xxiii, 225.^f ----, ----, elliptic, of reflected, _Powell_, xliv, 171; xlvi, 390. ----, ----, rings produced in specimens of decomposed glass, _D. Brewster_, xl, 325. ----, on the passage of, through small apertures, and on the cause of prismatic analysis, _C. C. Conwell_, xx, 350. ----, on the production of, _R. Hare_, ii, 172. ----, ----, _J. L. Sullivan_, i, 91.^f ----, ----, from quicklime, xiv, 385. ----, ----, ibid, for geodetical operations, xiii, 188. ----, on the production of, from quicklime, for light-houses, _T. Drummond_, xxi, 366. ----, reflection of, from different surfaces, _Potter_, xxviii, 59. ----, action of second surfaces of transparent plates on, _D. Brewster_, xxiii, 28.^f ----, solar, curious effect of, xii, 164. ----, ----, as compared with that of the moon and fixed stars, xvii, 362. ----, ----, chemical action of, see above. ----, zodiacal, see _Zodiacal_.

Lights, northern, see _Aurora Borealis_.

Light-houses, ix, 199. ----, lighted by means of lime, _T. Drummond_, xxi, 366.

Lighting by gas, see _Gas_. ---- of apartments, new method in Venice, x, 385.

Lightning, cure of asthma by, vi, 329. ----, a case of paralytic affection cured by, iii, 100. ----, effect of a stroke of, xvii, 193; xlvi, 215. ----, effects of a stroke of, in Wethersfield, Ct., xi, 359. ----, ---- ----, _J. H. Linsley_, xlii, 393. ----, ---- ----, upon the packet ship New York, _C. Rich_, xxxvii, 321. ----, ---- ----, on three ships, xxxviii, 112. ----, several strokes of, from the same explosion, v, 125. ----, passage of, _E. Kellogg_, ix, 84. ----, protection of steamboats from, _A. Jones_, xxii, 106. ----, wet or damp clothes, good conductors of, v, 121.^f ----, heat, xix, 187. ----, conductors in ships, utility of, _W. S. Harris_, xxi, 347. ---- rods, _R. Hare_ on, xiii, 322. ---- ----, _J. Murray_, xix, 186. ---- ----, observations on, _J. Van Rensselaer_, ix, 331. ---- ----, on the action of, xxxiv, 8, 18. ---- ----, mode of adjusting, xviii, 361. ---- tubes in sand, see _Fulgurite_.

Lignite, at Auteuil, in France, ii, 351. ----, on the carbonization of, xviii, 371. ---- of the ferruginous sand formation, U. States, xviii, 246. ----, in North Carolina, v, 407; xiv, 250. ---- of the McKenzie river and northern America, xvii, 4. ----, in Texas, xxxvii, 216.

Ligustrum vulgare, x, 258.

Lilium canadense, xi, 177. ---- Catesbæi, xi, 177.

Lime, intense light produced by means of, xiii, 188; xiv, 385; xxi, 366. ----, quantity used in Baltimore in 1832, xxvii, 17. ----, chloride of, x, 386; xv, 391; xvi, 387; xix, 166. ----, ----, used in psora, xvi, 395. ----, ----, use of, in the navy, xix, 164. ----, ----, action of, in alcohol, _E. Soubeiran_, xxiii, 134. ----, ----, manufacture of, at Glasgow, _T. Thomson_, xli, 48. ----, ----, ----, _G. W. Carpenter_, xvi, 177. ----, ----, estimation of the bleaching power of, xvii, 170; xxii, 354. ----, ----, disinfecting power of, xix, 177. ----, ----, disinfection at the Morgue, in Paris, xxi, 149. ----, common and hydraulic, iv, 373. ----, nitrate of, i, 133. ----, phosphate of, see _Apatite_. ----, sulphate of, from steam boilers, _J. F. W. Johnston_, xxxv, 300. ----, ----, and not carbonate in the waters of Pyrmont, xv, 185. ----, ----, used with the oxy-hydrogen flame for light-houses, xxviii, 355. ----, ----, see _Gypsum_.

Limestone, basaltiform, of Kingston, U. C., _R. H. Bonnycastle_, xxiv, 97; xxx, 233.^f ----, ibid, containing shells, penetrated with syenite, _R. H. Bonnycastle_, xxx, 243.^f ----, in Massachusetts, xxii, 24. ----, fertilizing properties of, xxx, 383. ----, compact, in eastern N. York, viii, 21. ----, ----, dove-colored, N. Y., iv, 44. ----, ----, rhomboidal structure of, at Boonville, N. Y., _O. P. Hubbard_, xxxii, 231.^f ----, ----, from St. Louis, Mo., analysis of, xliii, 21. ----, ----, of N. Carolina, analysis of, _J. T. Hodge_, xli, 334. ----, fetid, iii, 234. ----, granular, in the U. States, xli, 240. ----, ----, ----, in Maine, _C. T. Jackson_, xxxvi, 145, 147. ----, ----, singular conformation near Williamstown, Mass., _C. Dewey_, ix, 19.^f ----, ----, in Bolton, Mass., vii, 52. ----, ----, ranges of, through western Massachusetts, viii, 13, 28. ----, ----, ibid, alternation with mica slate, viii, 15. ----, ----, of the Connecticut valley, vi, 37; viii, 240. ----, ----, ibid, alternating with mica slate, viii, 240. ----, of Connecticut, at Salisbury, viii, 240. ----, ----, of New York, v, 266. ----, ----, of Pennsylvania, v, 41. ----, ----, &c., near Hudson's Bay, xvii, 13. ----, ----, of Maryland, fossils in, xxvi, 222. ----, granular, of New Jersey, minerals of, v, 239. ----, ----, ibid, alternating with granite rocks, v, 247. ----, ----, passing above into a secondary fossiliferous limestone, v, 247. ----, effect of trap dikes on, xxix, 351. ----, hydraulic, of New York, xxxix, 96; xlvi, 29. ----, ----, in the Appalachian chain, xxxvii, 381. ----, ----, magnesian character of, xxxvii, 381. ----, polished, of Rochester, _C. Dewey_, xxxvii, 240. ----, siliceous, (argentine) in Massachusetts, v, 268.

Limonia acidissima, v, 295.

_Lincoln, B._, notice of a water spout, xiv, 171.^f

Lincolnite, _E. Hitchcock_, xlvii, 416; xlviii, 64. ----, _C. U. Shepard_, xlviii, 175. ----, _B. Silliman, Jr._, xlviii, 180. ---- identical with Heulandite, _F. Alger_, xlvi, 233.^f

Lindernia saxicola, xliv, 83.

_Lindley, J._, review of the natural system of Botany of, xxxii, 292. ----, effect of the frost of the winter 1837-38, on plants in England, xxxix, 18.

Linen, a substitute for, found at Salem, Mass., xxvii, 179.

Lingula, fossil, indicating marine currents, near Lockport, N. Y., xxxvi, 37.

_Linnæus, C._, notice of an autobiography of, iii, 379. ----, life and works of, _C. Fox_, xxxvii, 142. ----, Systema Vegetabilium, a new edition of, _Romer_, i, 435. ----, letters from, to C. Colden, xliv, 111. ----, memoir of, xxv, 151. ----, notice of the herbarium of, xl, 2.

_Linsley, J. H._, catalogue of the birds of Connecticut, xliv, 249. ----, catalogue of the fishes of Connecticut, xlvii, 55. ----, catalogue of the mammalia of Connecticut, xliii, 345. ----, catalogue of the reptiles of Connecticut, xlvi, 37. ----, on a stroke of lightning, xlii, 393. ----, obituary notice of, xlvi, 216.

Liquefaction of gases, _M. Faraday_, vii, 352; xlix, 373. ---- ----, _J. Torrey_, xxxv, 374. ---- ----, _J. K. Mitchell_, xxxv, 346.^f

Liquids, principles of the resistance of, _L. R. Gibbes_, xxvii, 135. ----, ---- ----, _A. Bourne_, xxviii, 231. ----, ---- ----, _G. W. Keely_, xxviii, 318^f; xxx, 164; xxxi, 111. ----, ---- ----, _E. W. Blake_, xxix, 274; xxx, 359. ----, ---- ----, _Russel_, xxix, 351. ----, revolving motion in, xix, 391. ---- of different specific gravities together, rotation of, _W. R. Johnson_, xxvii, 84.^f ----, on the upward forces of, _E. C. Genet_, xi, 110, 339^f; xii, 94, 310; xiii, 377. ----, ibid, reply by _T. P. Jones_, xiii, 79.

_Lister, Martin_, notice of, _C. Fox_, xxxvii, 137.

Lithia, a new alkali, i, 309. ----, blowpipe test, when mixed with soda, xlviii, 193. ----, new process for obtaining, _Quesneville_, xx, 194.

Lithographic establishment in Portugal, ix, 366. ---- impressions of leaves of plants, v, 170. ---- paper, iii, 370. ---- printing of MSS., iv, 197. ---- stone, new locality of, in Spain, v, 386. ---- ----, locality in the French Pyrenees, xlix, 401.

Lithography, notice of, iv, 169.

Litmus paper, as prepared by _Gay Lussac_, xvii, 165.

Litrameter, on the, xi, 133.^f

_Litton, A._, a double sulphite of the protoxide of platinum and soda, xliv, 274.

Liver pies of Strasburgh, xxii, 194.

Liverpool, objects of interest in, xxxiv, 52.

Living molecules, _R. Brown's_, xvii, 390. ---- particles in all kinds of matter, motion of, xix, 393.

Lizards in chalk, xxxvii, 402. ----, see under _Zoology, Reptiles_.

Lobelia aphylla, v, 297.

_Locke, J._, alabaster of the mammoth cave of Kentucky, xlii, 206.^f ----, a new botanical press, xxx, 54.^f ----, microscopic compass, xxiii, 237.^f ----, on the manipulations of the dipping compass, xlii, 235. ----, electro-magnetic multiplier, xxvi, 380. ----, notice of a galvanometer, xxvi, 103.^f ----, improvements on his galvanometer, xxvi, 378^f; experiments with, 379, 381. ----, on a large thermoscopic galvanometer, xxxiii, 365. ----, geology of the U. States, west of the Allegany Mountains, xli, 160. ----, lead region of the West, xliii, 147. ----, magnetic dip in the United States, xli, 15. ----, ---- ---- at Baltimore, xlii, 258. ----, on magneto-electricity, and electro-magnetic machines, xxxiv, 125.^f ----, connection between geology and magnetism, xlvii, 101. ----, on manufacture of maple sugar, ii, 259. ----, notice of a new trilobite, Ceraurus crosotus, xliv, 346^f; xlv, 222.^f ----, Isotelus megistus, a new trilobite, xlii, 366.^f

_Lockwood, M. B._, variation of the magnetic needle at Providence, R. I., xliv, 314.

Locust, seventeen year, habits of, xiii, 224. ----, ---- ----, notice of, _S. P. Hildreth_, xviii, 47.^f ----, ---- ----, remarks on, _D. Thomas_, xxi, 188.

Locusts in China, xxxi, 193.

Lodoicea sechellarum, notice of, _J. E. Teschemacher_, xxxvii, 396.

Logan, murder of the family of, xxxi, 11.

Logarithmic tables, corrections in _Hassler's_, xxii, 181. ---- and exponential theorems, new mode of obtaining, _T. Strong_, xlviii, 36.

Logwood, on hæmatoxylin the coloring principle of, xliv, 357.

_Long's_ expedition to the Rocky Mountains, vi, 374.

_Long, G. W._, description of a frame bridge, xviii, 123.^f ----, on the origin of springs and fountains, xvii, 336. ----, a parasite tree, xxvi, 106.^f

Long lake and Mud lake, Vt., on the eruption of, _S. E. Dwight_, xi, 39.^f

Longevity of trees, xxii, 379. ---- of the yew tree, xxix, 353. ---- ---- ----, _Bowman_, xxxi, 358.

Longitude, notice of _F. Baily's_ method of determining, by the culmination of the moon and stars, ix, 107. ----, determination of, by means of shooting stars, xxxix, 372; xlii, 399. ----, arc of, between Dublin and Armagh, xxxviii, 113. ---- deduced from the eclipse of Sept. 18, 1838, xxxix, 367. ---- of New York, v, 143. ---- of New York City Hall, xxxviii, 113; xl, 43. ---- of Alexandria, D. C., xxxix, 368. ---- of Boston, xl, 43. ---- of Brooklyn, N.Y., xxxix, 369; xl, 43. ---- of Burlington, N.J., xxxix, 368. ---- of Dorchester Observatory, Mass., xxxix, 369; xl, 43. ---- of Dover, Ohio, xxxix, 368; xl, 43. ---- of Germantown, Penn., xxxix, 368. ---- of Haverford School, Penn., xxxix, 368. ---- of New Haven, xxxiv, 309; xxxix, 369; xl, 43. ---- of Hudson Observatory, Ohio, xl, 43. ---- of Philadelphia State House, xxxix, 368; xl, 43. ---- of Philadelphia High School Observatory, xl, 43. ---- of Princeton, N.J., xxxix, 368; xl, 43. ---- of Southwick, Mass., xxxix, 369; xl, 43. ---- and latitude of Turtle Island, Lake Erie and South Bend lake, Michigan, xxxviii, 154. ---- of Washington capitol, xxxix, 368; xl, 43;--marine observatory, xl, 43. ---- of Weasel mountain, N. J., xxxix, 368. ---- of Wesleyan University, Middletown, Ct., xxxix, 369. ---- of Williamstown College, Mass., xxxix, 369. ---- of Western Reserve College, Ohio, xxxix, 368.

_Loomis, E._, clouds, register of, Hudson, Ohio, xli, 323; xlix, 280. ----, on Halley's comet, xxx, 209. ----, hygrometric observations at Hudson, Ohio, 1838-1840, xli, 315. ----, ---- ----, 1841-1844, Hudson, Ohio, xlix, 271. ----, latitude and longitude of Yale College observatory, xxxiv, 309. ----, on the variation and dip of the magnetic needle in different parts of the U. States, xxxiv, 290^f; xxxix, 41^f; xl, 85; xliii, 93. ----, magnetic dip of various places in Ohio and Michigan, xxxviii, 397. ----, observations on the variation of the magnetic needle at Yale College, xxx, 221. ----, examination of _Gauss's_ theory of terrestrial magnetism, xlvii, 278. ----, meteorological register at Western Reserve College, Sept.-Nov., 1838, xxxvi, 165. ----, ---- ibid, for 1838-1840, xli, 310. ----, ---- ibid, for 1841-1844, with a summary for seven years, xlix, 266. ----, on shooting stars, xxviii, 95.^f ----, on the meteor of May 18, 1838, and on shooting stars in general, xxxv, 223. ----, on a hurricane which passed over Stowe, Ohio, Oct. 1837, xxxiii, 368.^f ----, on the storm of Dec. 1836, in the U. States, xl, 34. ----, ----, Feb. 1842, Mayfield, Ohio, xliii, 278.^f ----, list of tornadoes in the United States, since 1823, xliii, 298. ----, direction of rotation of small whirlwinds, xliii, 296. ----, on vibrating dams, xlv, 363.^f

_Lord, E._, on architectural, rural, domestic, and other improvements, xxv, 304.

Louisiana, trees with axe marks, _W. M. Carpenter_, xxxvi, 118.^f ----, fossil tooth, _W. M. Carpenter_, xlii, 390.^f ----, fossil teeth of the mastodon and horse, _W. M. Carpenter_, xxxiv, 201.^f ----, meteorological register at Jackson, _W. M. Carpenter_, 1839-1841, xliv, 49. ----, hailstorm in, _W. M. Carpenter_, xxvii, 171. ----, Opelousas and Attakapas, geological character of the prairies, with remarks on the vegetation of, _W. M. Carpenter_, xxxv, 344. ----, ibid, bituminized wood, East Feliciana, xxxv, 345.

Lowell, facts relating to, xxvii, 340.

_Löwitz, H. Fitz_, fusible cement of, xvii, 81.^f

Ludlow rocks, fossil shells of, xxx, 48.