510 INDEX. 



Plants, orchideous of Chile, remarks upon, 43 — dried, from Massa- 

 chusetts, notice of, 210 — structure of, 496 — and vegetables, me- 

 thod of reviving, 500 



Ponderable matter, transference of in electric discharges, 472 



Potash, analysis of the triple prussiate of, 236 — peroxideof, from 

 nitre, 483 



Potassium, action of, on oxalates, 236 



Powders, apparatus for taking the specific gravities of, 226 



Quadrupeds, note on the motions and actions of, 243. 

 Quesnevile, (M.) on the separation of iron from manganese, 235 

 Quinia, sulphate of, quantity manufactured, and adulteration of, 

 484 



Rattlesnakes, poison of, 246 



Record, (M. le Dr.) his mode of preventing mischief resulting from 

 the bites of venomous reptiles, 246 



Reinagle, (Mr.) on the beautiful forms derived from the oval, 457 



Renwick, (James, Esq.) on the weights and measures of New York, 

 101 



Reptiles, venomous, method of preventing mischief from the bites 

 of, 246 



Resistance of various bodies to rupture caused by longitudinal ten- 

 sion, 223 



Returning stroke by lightning, instance of, 230 



Roads, Macadamized, report on, 470 



Robiquet and Colin, (MM.) on the colouring matter of madder, 

 239 



Rousseau, (M. E.) on the poison of rattlesnakes, 246 



Royal Institution of Great Britain, proceedings of, 209, 456 — 

 medals, on the recent adjudgment of, by the President and Coun- 

 cil of the Royal Society, 1 1 — Society, proceedings of, 207, 455 



Sabine (Capt.) extract of his letter respecting the subject of the 



weights and measures of New York, 382 

 Salt, on the introduction of as an agricultural agent, 337 

 Salts, efflorescent of volcanic rocks, 482 

 Sea, fresh water found at, 502 

 Sea-gull, measurement and weight of, 244 

 Seal, on the structure and habits of the, 71 

 Shot cartridges, peculiar construction of, 224 

 Silver, crystallized chromate of, 484 

 Sketch of the Life of the late Samuel Parkes, Esq., 1 

 Skins, method of preserving, 227 

 Soft steel, menstruum for biting-in on plates of, 226 

 Solar tables, remarks on the, 438 

 Struve, (M.) on micrometrical measurements, 220 



