INDEX. 
I. 
Icebergs, influence upon drift, 317. 
Ice mountain of Hampshire County, Vir- 
ginia, 78. 
Igneous action, phenomena of, 143. 
rocks and primary formations, 
analogies between, 104. 
Infusorial stratum of Virginia, limits of, 
313. 
Iodine in phanerogamic plants and moss- 
es, 227. 
Tris Duerinckii, a new plant, 176. 
J. 
Jackson, C. T., on the organic matters 
of soils, 337. 
drift, 320. : 
Juncus Greenei, a new plant, 37. 
Justicia letevirens, a new plant, 176. 
K. 
Karsten’s experiments on the images of; 
Moser, 228. 
Kendall, E. O., on the great comet of| 
1843, 188. 
on the phenomena of 
L. 
Labyrinthodonts, analogy of their teeth 
with those of the Lepidostei, 361. 
Lea, I., monograph of fresh-water and 
land shells noticed, 401. 
Lepidanche adpressa, a new species, 77. 
Lepidostei, microscopic structure of their 
teeth, 359. 
analogy with those of the 
Labyrinthodonts, 361. 
Lime, carbonate of, in calcareous sub- 
stances, 262. 
phosphate of, in the Virginia me- 
teoric stone, 102. 
Liquids, density of, influenced by pres- 
sure, 
Locke, J., supplementary notice of the 
Ceraurus crosotus, 222. 
Loomis, E., on vibrating dams, 363. 
Lyell, C., on fossil trees in the coal strata 
of Nova Scotia, 353. 
on the coal and gypsiferous for- 
mations of Nova Scotia, 356. 
on the fossil foot-prints of birds 
and impressions of rain-drops in the 
valley of the Connecticut, 394. 
M. 
Malva LeContii, a new plant, 176. 
Mammalia, new fossil, Dr. Harlan’s re- 
marks on, 208. 
Mantell, G.‘A., letter of Dr. Deane to, 
178. 
reply of, 184. 
notice of Molluskite, 
243. 
on fossil fruits in the 
chalk formation, 401. 
A07 
Martius and Endlicher’s Flora Brasilien- 
sis, 217. 
Metamorphic changes produced by heat, 
Meteoric epoch of August, 403. 
observations, April 20, 1843, 
230. 
stone of Virginia, phosphate of 
lime in, 102. 
Missouri, mineral region of, 340. 
River, cretaceous formation of, 
153. 
Molluskite, Dr. Mantell’s notice of, 243, 
Monazite identical with eremite, 402. 
Morse, S. F. B., experiments with elec- 
tro-magnetic telegraph, 390. 
Moéser’s images, Karsten’s experiments 
on, 228. 
Mud furrows, casts of, 148. 
Murchison, R. 1., on the Ornithichnites 
and Dinornis, 187. 
N. 
Nicollet, J. N., on the cretaceous forma- 
tion of the Missouri River, 153. 
on the glacial theory of 
Agassiz, 323. 
on the mineral region of 
Missouri, 340. 
obituary of, 404. 
Nitrogen in organic compounds, 267. 
Nomenclature of zoology, 1. 
Nova Scotia, coal and gypsiferous for- 
mations of, 356. 
fossil trees in the coal stra- 
ta of, 353. 
Obituary of Robert Bakewell, Esq., 403. 
of Prof. F. Hall, 404. 
of J. N. Nicollet, Esq., 404. 
Ornithichnites of the Connecticut River 
sandstones, 177. 
Osborn, M. W. and N.S., on a vibrating 
dam, 366. 
Owen, D. D., on fossil palm trees in In- 
diana, 336. 
on geological paintings and 
illustrations, 136. 
on the geology of the west- 
ern states, 151, 163. 
universal system of geolo- 
gical coloring and symbols, 354, 
Owen, R., Dr. Harlan’s reply to his let- 
ter on new fossil mammalia, 208. 
on the Ornithichnites of the 
Connecticut valley and the Dinornis 
of New Zealand, 185. 
1p 
Paintings and illustrations, geological, 
136. 
Palm trees, fossil, 336. 
Phacelia brevistylis, a new plant, 172. 
Purshii, a new species, 171. 
pusilla, a new species, 172. 
