INDEX. 383 
Platinum, combustion of, 295 
Plumose mica, 141 
Plumbago, 238, 241 
Pvison, animal, 168—antidotes, 358 
Potatoe fly, cantharidin in 137 
Porter, T. D. c onttibation to Geol. Soc. 143 
on snow Crystals, 339 
Prairies and Barrens of a est, 30 
Prehnite of New-Jersey, 1 232 
Prepara tions, simrneccatial 373 
Primitive limestone in mica slate, 211 
Saal geal ee of the hop, 307 
rince, James, on sea serpent, 157 
Problems, marbensicaiks 54, 266 
Prussic aci 
Purple of Cassius, new mode of preparing, 350 
Quartz crystals with water, 14 
Rafinesque, reply to, 134 Rattle snakes, 229 ‘ 
Red sandstone of North-Carolina, 175. ~~ Remilla Americana, 35 
Revue Encyclopedique, 1 Rhinoceros, fossil bones of, 145 
Rochester, town of, 252 Rocks, succession of, 235 
omanzow, Count, his expedition, 34: 
Rosin, bubbles blown in, 1 Rot, dry, 11 
Rubellite of Kingsbridge, 367 Ruby, fusion of, 292 
ush, Dr. on sugar of the maple, 261 Rye, ergot of, 45 
Salisbury iron ores, 213 Sandstone of New-Jersey, 190 
Sappar, 141—fusion of, 291 
at the mouth of the Genesee River, 251 
Screws, manufactory of, 208 
Serpent of the sea, documents respecting, 147 
eripestine of Middlefield, 23 
Shells, known and unknawa, 244 Shrubs on the Kaatskills, 26 
Sidesis graphite, 176, 370 Silex, fusion of, 292 
Silliman, B. on Prussic acid, 8 
. Soc. 201 
experiments with gas blow pipe, 282 
Simplon, wad of, 1 Skeletons, human, ancient, in- Obi, 243 
Slate and sandstone, 15—chlorite, a te tren neers 248 
“ss ocks, primitive, 203 Snow and bail, 13 
Spar, bitter, 236 a at ian 
team engine of Morey, 101, 106, 112 
