402 



INDEX. 



Deinotheriuin, models of teeth of, 362. 



Depth of mines, 374. 



Deutarseniurel of nickel of Riechelsdorf, 



241. 

 Dewej-j Prof. C, on caricography, 245. 

 Diamonds in North America, 334. 



, matrix of, 366. 



— , nature of, 3G6. 

 Dip of the compass needle, 353. 

 Dodo, 6ast of the head, 362. 

 Draper^ J. W., on coins and medals^ 157. 



E. .' 



Echinus, fixation of the spines of, 353. 



Education of children, 349. 



Electrical currents, indueuce of terras 



trial magnetism and electro-d3^namic 



magnets on chemical action of, 369. 

 Electricity, retained in a vacuum, 354. 

 Electro-dynamic magnets, influence on 



chemical action of electrical current.^. 



369. 



F. 



Fata Morgana, at Gibrallar, 214. 

 Ferruginous deposits in Ohio and Ken- 



tuc%, 129. 

 Fish, lossil, 351. 

 , Agassiz's researches on, 



Geology of the Cheat and Greenbrier 



iVIountains, 63. 

 _ Gauly river, 98 



Kiskiminitas, 74. 



Lakes and valley of the 



Mississippi, 201. 

 Monongahela, 58. 



Muskingum, 15, 



valley of the Ohio, 1. 



- vicinity of Cape of Good 



363. 



Flora, fossil, of N. America, new 

 on, 393. 



Fluids, resistance of, 274, 351. 



Forces, parallelogram of, 345. 



Forest, fossil, near Glasgow, 352 



trees in the valley of Ohio, 



Fossil columnar madrepore, 99. 



fish, 351. 



, Agassiz's researches on, 



work 



14 



363 



flora of N. America, Rahnesque's 



work on, 393. 



forest, near Glasgow, 352. 



mammalia, 146. 



orsranic remains of coal measures 





&c. in Hildreth's account of the valley 



of Ohio, 149, &c. 

 Fossil plants in the valley of Ohio, 1. 

 — trees in sandstone, 49, 112. 

 Fox, Charles, on some American birds, 



&c.» 291. 



G, 



Galvanic machine, 354. 



Gauly river, geology and topography of, 



Geological Society of Penn., Transac- 

 tions of, pari n, 391. 



Geology, Lyeirs, 4th London edition. 

 368. 



352 



Wal 



ca, 210. 



— ■ Monte Video, South Amen- 



Hope, 230. 



German journals, notice of, 375. 



Gibson, Judge J. B., on the geology of 

 the Lakes and valley of the Mississip- 

 pi, 201. 



Good Plope, topography and geology of 



the vicinity of, 230. 

 Grotto of plants in Ohio, 18. 

 Guyandottand Sandy rivers, topography 



of, 126. 

 ^ geology and 



mineralogy of, 128. 



H. 



Halley's Comet, 155. 



Hanging rock, 139. 



Hare, Prof. R., apparatus fur obtaining 



prussic acid, 244. 

 , on explosive reaction of 



hydrogen and chlorine in solar rays, 



243. 



Hawkins' collection of Saurian remains, 



367. 



Heat of the sun, 349. 



, long continued effect of, on miner- 

 als 357- 



Hitldreth,' Dr. S. P., on the bitumuotis 

 coal formation of the valley of Ohio, 

 and its organic remains, vegetable and 

 animal, 1. 



Hitchcock, Prof. E., on foot marks at 

 birds, ornilhichnites, on new red sand- 

 stone of Massachusetts, 307. 



Hockhocking Valley, topography of, 

 146. 



Hosack, obituary of, 395. 



Human remains in England, 364- 



, new mode of preserv- 

 ing, 359. 



Hydatids in human muscles, 353- 



Hydrogen, explosive reaction with chlo- 

 rine in the sun's rays, 243. 



L 



Idria, quicksilver mines of, 219. 

 Iguanodon, cast of a tibia of, 362- 

 Indiana, meteorological notices in, 294. 



freland, topaz in, 374. 

 Iron, application of hot blast in produ- 

 cing cast, 356. 

 Iron ores in Kentucky, Ohio, &c., ISB, 



P:>9. 134, 137, 139- 



Ischil Salt mountains^ 225. 



