PROCEEDINGS, VOLS. 1-50 



LESLEY-LIME 



Lesley, J. Peter (continued). 



— — violation of the law of debitu- 

 minization of the American coal 

 beds coming east, 12, 125. 



vortical gales of Januar}', 1864, 



9. 361. 

 Lesley, ^Irs. J. Peter, sketch of 



Madam Seller, 29, 151. 

 Lesle}', Joseph, growth in ice, 21, 



217. 

 outcrop belt of east Kentucky 



coal held, 13, 270. 

 Lesquereux, Leo, American coal 



flora 9, 198. 



— — branch of the cordaites bear- 

 ing fruit, 18, 222. 



cordaites in the carboniferous 



formation of the U. S., 17, 315. 



Cours de Botanique Fossile, 19, 



287. 



fungus in Darlington shales at 



Cannelton, Pa., 17, 173. 



jNIillstone Grit in the far West, 



9, 198. 



-North American carboniferous 



flora, 16, 397. 

 , — Carolina Triassic plants 



found in Bucks Co., Pa., 19, 16. 



obituary notice of, 28, 65. 



, of Oswald Heer, 21, 286. 



-Silurian land plants in Ohio, 17, 



163. 

 Level for transit instruments, new, 



10, ?88. 



Levels, railroad and oil well, in 

 northwestern Pa., 16, 667. 



Lewis, Henry Carvill. aurora of 

 April 16-17. 1882, 20, 283. 



great trap-dyke across south- 

 eastern Pennsylvania, 22, 438. 



— -—shells found by, at Saltville, 19, 



155- 

 substance resembling Dopplerite, 



20, 112. 



-terminal moraine in Penna., 20, 



662. 



Lewis, James, (prime) right-angled 

 triangles, and V'2, 9, 415. 



self-registering thermometer, 7, 



295. 316. 



Lcwns and Clark, mss. journals and 

 field notebooks of, 31, 17. 



Leyburn, John, obituary notice of 

 Joseph Addison Alexander, 7, 320. 



Libellulidc'e, second abdominal seg- 

 ment in, 35, 205. 



Liberty and necessitj-, 9, 131. 



Life insurance, saving fund. 14, 148. 



— span of, 36, 420. 



— tables. Philadelphia, 11, 17. 

 Light and gravity, relative velocities 



of, 13, 148. 



— and sound, gamuts of, 13, 149. 



— cosmical relations of, to gravity, 

 II, 103. 



— polarized, application of, to chem- 

 ical analysis, 4, 349. 



— velocity of, nodal estimation of 

 the, 19, 4. 



, — , simple harmonic relation be- 

 tween terrestrial gravity and, 10, 

 261. 



, — and Kirkwood's analogy, 18, 



-^25. 



Lightning, efl'ects of, in deep mines, 

 10, 2S8. 



— , — on telegraph wires, 4, 259, 260. 



— photography by, 23, 257. 

 — -protectors. 4, 179. 



— stroke, protection of oil tanks 

 from, 19, 216. 



Lignite, Arkansas peat and, 20, 225. 

 — -beds of upper ^Missouri, 10, 300. 



— groups, geological relations of the, 

 14, 447- 



— • Pennsylvania, 9, 463. 



Lilley, A. T., section of Chemung 



Rocks at Le Roy, Pa., 21, 304; 23, 



291. 

 Limestone and iron ores, 14, 84. 



— primary, near Chadd's Ford, Pa., 

 8, 281. 



49 



