INDEX. 
Motion of a system of bodies, by Prof. 
Strong, 44. 
N. 
Navigation of Cape Horn, 54. 
Naiades, sexual characters of, 117. 
O. 
Obituary of Gen. Martin Field, 204. 
Rev. Lewis D. De Schwein- 
itz, 218. 
Olinsted, Prof. D. on Meteors of Nov. 13, 
1833, 182. 
Osmium, method of obtaining, from plati- 
num residue, 371. 
Ozokerite, 388. 
12, 
Page, C. G. on new electrical instru- 
ment, 110. 
Paper, materials for, 193. 
Parasite tree, 106. 
Parkinson & Frodsham, sea and landrates 
of their chronometers, 121. 
Parrot, M. on temperature of the earth, 
10. 
Pelokonite, 386. 
Penn., internal improvements of, 108. 
Physical discovery to correct the magnet- 
ic needle, 90. 
Platinum in France, 389. 
—, method of obtaining osmium 
and iridium from residue of, 371. 
, price of, 210. 
Plumbacalcite, 386. 
Porcelain and earthenware, 233. 
Prairies of Alabama, 93, 
Pyrargillite, 387. 
R. 
Razors, action of heat upon, 189. 
Rock blasting by galv. ignition, 352. 
Rogers, Prof. W. B. on analysis of shells, 
361. 
Rotating armatures, 205. 
Ss. 
Sarracenia, 316. 
Schley, Geo. on steam as a conductor of| 
electricity, 206. 
Schweinitz, Rev. Lewis D. De, obituary 
of, 218. 
405 
Scientific publications, recent, in the U. 
S., 208, 397. 
Septaria very large, 217. 
Shells, analysis of, 361. 
, some new oneson the coast of 
New England, 366. 
Shepard, C. U., school of Nat. History, 
215. 
Skins, method of preserving, 188. 
Solar system, elements of the, 229. 
Sparks in the freezing of water by ether, 
179. 
Spring birds, on the time of their appear- 
ance at Williamstown, in Massachu- 
setts, in 1831, 32, 33, 208. 
Steam as a conductor of electricity, 206. 
Stereotype metallographic printing, 192. 
Strong, Prof. T., on the motion of a sys- 
tem of bodies, 44. 
—-, parallelogram of forces, 304. 
Sulphuric acid, its manufacture, 207. 
as 
Tapir, fossil jaws of the, 218. 
Temperature of the earth, 10. 
Tenantite, analysis of, 386. 
Test-paper of purple cabbage, 210. 
Thermo-electricity, Prof. Emmet, on, 311. 
Thomas, M. D. on chrysomela vitivora and 
corydalis formosa and canadensis, 112, 
114. 
Tinned lead pipes, 210, 400. 
Tolefree, Robert, Jr. on the voice and its 
modifications, 76. 
Totten, Jos. S., on some new shells of 
the New England coast, 366. 
Twining, Alex. C., on the meteors of Nov. 
13th, 1833, 320. 
Wo 
Vanadiate of lead, 386. 
Vegetables, circulation in, 99. 
Voltaic Induction, 23. 
Voice dnd its modifications, 76. 
Ww. 
Waters deep, color of, 65. 
Wolchoushoit, 387. 
Worthite, 387. 
X. 
Xanthite, 388. 
