420 
Plants, new species of, in Siberia, 383. 
preservation of, in winter, 359. 
respiration of, 362. 
sleep of, 375. 
Platina, imitation of, 383. 
Polarizatien of light, 277. 
Premiums fer chemical and medical dis- 
coveries, 194. 
Premiums, French, 359. 
Preparations, medical, by G. W. Carpen- 
ter, 293. 
Protoxide of copper, 353. 
Pyrometer, steam, W. R. Johnson on, 96. 
RK. 
Rail roads, elevation of the rails of, Prof. 
Thomson on, 346. 
Rain-gage, conical, by S. DeWitt, 321. 
Red beets, 201 
Report on the geology of Massachusetts, 
by Prof. Hitchcock, ite 
Report of the regents of the University of 
the state of New York, 415. 
Resources, natural, of the western coun- 
try, 122. 
Respiration of plants, 362. 
peek onanew metallic dye, 197. 
2h 
Sandstone, new red, 8, 35. 
Serpentine, 29. 
Sharpless, Dr. J.T., on the American wild 
swan, 83. 
Shepard, C. U., on brown lead ores, 307. 
soda alum of Milo, 387 
datholite and iolite, 387. 
Treatise on Mineralogy, 
396. 
Silicon, Dr. Hare’s 
Silver, 63. 
purple precipitate of, 198. 
Sines, tangents and secants, rational ex- 
pressions for, 391. 
Size for cotton and linen, of Lichen Island- 
icus, 366. 
Smith, Alfred, on the Connecticut River 
valley, 205. 
Soda alum of Milo, 387. 
Solar eclipse of Feb. 12, 1831, 189. 
Sound, limits of the audibility of, 374. 
South seas, icebergs in, 200. 
s process for, 189. 
Spafford, H. G., on evergreens, 158. 
spontaneous combustion, 
161. 
Species, new, of plants, in Siberia, 383. 
Spontaneous combustion, 161. 
Statistics of iron in the United States, 179. 
Stature of the human race, 357, 376. 
Steam pyrometer, W. R. Johnson cn, 96. 
boats, protection of, from lightning, 
106. 
INDEX. | 
Steatite, 31. 
Steel, protection of, from rust, 382. 
St. Petersburgh Academy, 203. 
Strong, Prof., on central forces, 132, 342. 
Sulphur, hydruret of, 351. 
Swan, American wild, Dr. Sharpless on, 
83. 
Es 
Telescopes, achromatic, 358. 
Temperatures, increased, 
powers of, 111. 
Tertiary formation of Massachusetts, 36. 
Thermoscope, new, 370. 
Thomas, Edward, necrology of, 380. 
Thomson, Prof., on the elevation of rails 
on roads of a given curvature, 346. 
disinfecting 
-lTin, 62. 
Transplanting of trees, 383. 
Trees, longevity of, 379. 
transplanting of, 383. 
Trilobites, Prof. Eaton on, 165. 
UW, 
Ultramarine, French, 368. 
University of the state of New York, re- 
port of the regents of, 415. 
ve 
Valley of the Connecticut, A. Smith on, 
205. 
Wie 
Water, good, from a new plant, 382. 
medicinal, Dr. Meade on the pre- 
paration of, 126. 
Weeds in garden alleys, destruction of, 
381. 
Wells, bored, use of the heat from the 
water of, 373. 
Westchester County cabinet of natural 
science, 402. 
Western country, natural resources of, 
122. 
Whiriwind storms, Capt. Riley on, 189. 
Wilmsen, Frederic Philip, necrology of, 
380. 
Wines, grease of, 192. 
Wright, E., mathematical papers by, 74. 
pis 
Young, Dr. Thomas, memoir of, 232. 
Z. 
Zinc, 61. 
