LON 
Locke, J., notice of a new trilobite, 
Ceraurus crosotus, xliv, 3466 ; 
xlv, 222.f 
, Isotelus megistus, a new tri- 
lobite, xl, 866.f 
Lockwood, M. B., variation of the 
magnetic needle at Providence, 
R. L, xliv, 314. 
Locust, seventeen year, habits of, 
Xill, 224. 
, notice of, S. P. 
A7.£ 
; , remarks on, D. 
Thomas, xxi, 188. 
Locusts in China, xxxi, 192. 
Lodoicea sechellarum, notice of, J. 
E. Teschemacher, xxxvii, 396. 
Logan, murder of the family of, 
xxxi, 11. 
) 
Hildreth, xviii, 
Logarithmic tables, corrections in 
Hassler’s, xxii, 181. 
and exponential theorems, 
new mode of obtaining, T. 
Strong, xlviil, 36. 
Logwood, on hematoxylin the col- 
oring 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, Xvll, 336. 
, 2 parasite tree, xxvi, 106.f 
Long lake and Mud lake, Vt., on the 
eruption of, S. E. Dwight, xi, 39.! 
Longevity of trees, xxil, 379. 
of the yew tree, xxix, 3538. 
, Bowman, xXxXxi, 
358. 
Longitude, notice of F. Baily’s 
method of determining, by the 
culmination of the moon and 
stars, ix, 107. 
shooting stars, xxxix, 372; xlil, 
399. 
, arc of, between Dublin and 
Armagh, xxxvili, 113. 
deduced from the eclipse of 
Sept. 18, 1838, xxxix, 367. 
of New York, v, 143. 
AG 
, determination of, by means of| 
LOO 
Longitude of New York City Hall, 
xxxvill, 113; xl, 43. 
of Alexandria, D. C., xxxix, 
368. 
of Boston, xl, 43. 
of Brooklyn, N.Y., xxxix, 369 ; 
xl, 43. 
of Burlingtgn, N.J.,xxxix,368. 
of Dorchester Observatory, 
Mass., xxxix, 369; xl, 48. 
of Dover, Ohio, xxxix, 368; 
xl, 43. 
of Germantown, Penn., xxxix, 
368. 
—— of Haverford School, Penn.., 
Xxx1x, 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, 48. 
and latitude of Turtle Island, 
Lake Erie and South Bend lake, 
Michigan, xxxviiil, 154. 
of Washington capitol, xxxix, 
368; xl, 43;—marine observa- 
tory, xl, 43. 
of Weasel mountain, N. J., 
XXXIx, 368. 
of Wesleyan University, Mid- 
dletown, Ct., xxxix, 369. 
of Williamstown 
Mass., xxxix, 369. 
of Western Reserve College, 
Ohio, xxxix, 3868. 
Loomis, E., clouds, register of, Hud- 
son, Obio, xli, 8238; xlix, 280. 
, on Halley’s comet, xxx, 209. 
, hygrometric observations at 
Hudson, Ohio, 1838-1840,xli,315. 
, 1841-1844,Hud- 
son, Ohio, xlix, 271. 
, latitude and longitude of Yale 
College observatory, xxxiv, 309. 
College, 
