376 



• Orchilla, its latitude corrected by J. A. Macwhirter, Esq. 368. 



• Organized bodies, suggestions on their relation with the conditions of their ex- 

 istence, 65. 



Organs of voice in birds, notice of Mr. Yarrell's remarks on the, 465. 

 Ottoman empire, vassals of the, 443. 

 Oxide of iron, artificial crystals of, 302. 



Paris, account of its scientific coteries, 116. , 



Pelvis in the river trout, 478. 



* Pereira, Jonathan, F.L.S., his account of the physiological effects of Aconilum 

 fero.v, 235. 



* Peron's Peninsula, in Western Australia, account of, 249. 



* Peuquenes, (Chile) Dr. Gillies' account of the volcano of, 315. 

 Pholonitic rocks, M. Gmelin's analysis of, 295. 



Phrenology, opinions of scientific men respecting, {Dr. Aliso7i) 57- {Baron 



Cuvier) 147. 

 Physiological phenomena produced by electricity, 232. 

 Plants of Northumberland and Durham, Mr. Winch's table of, 455. Distinc- 



tinctive character of their roots and stems, 293. 



* Platessa carnaria, Capt. Brown' s description of, 99. 

 Poland, journals and periodical publications of, 445. 

 Polish Jews, account of the, 284. 



Polypi and Actinim, Rapp on the, reviewed, 405. 



Potocki's travels in the Steps of Astrakhan and the Caucasus, reviewed, 191, 41 1 . 



* Proto-nitrate of mercury. Dr. O'Shaughnessy on a singular crystallization of, 

 229. 



* Pyrenees, general considerations on the, 203. 



R" 



Races humaines, Edwards sur les caracteres physiologiques des, reviewed, 31. 

 Rapp on Polypi and AclinicB, reviewed, 405. 



* Rathkes discoveries respecting the respiratory organs, 173. 

 Refraction double. Dr. Brewster on its production by simple pressure, 70. 

 Respiratory currents of aquatic animals, 374. 



* Respiratory organs, on the double type of the, 173. 

 Respiration of fishes, influence of water on the, 145. 



" Respiration, Dr. Sharpey on its mechanism in aquatic animals, 334. 

 Revolving motions produced by the combination of alcohol with laurel oil, 302. 



* Rhind, William, Esq. his examination of the opinions respecting the equivoe:il 

 production of animals, 391. 



Rivers of Canada described, 129. 

 Roots and stems of plants, characters of the, 293. 

 Rossel, Mr.de, account of his death, 128. 



Russia, Asiatic provinces of, scientific expedition to the, 48. Hydrography of, 

 210, 276. Schnitzler's essay on the general statistics of, reviewed, 411, 



