424 INDEX. 



Prout (Dr.,) on the nature of the acid and saline matters, usually 



existing in the stomachs of animals, 142-144 

 Provence, wines of, 128 

 Purace, volcano, account of, 404-406 

 Puzzolana, artificial mode of preparing, 381 



Q,uartz, peculiar fracture of, 167 



Radiation of heat in the atmosphere, observations on, 305-312 



Red cabbage, colour of, how to preserve, 402 



Resinous bodies, electrical conducting power of, 403, 404 



Respiration, exhalation of water during, ^192 



Rhenish wines, account of, 130, 131 



Right line, geometrical process for the division of, 157-160 



Riiesaltes, vineyards of, 128 



Rocks of Lake Superior, observations on, 1-34, 228-269. Lami- 

 nated, foliated, aud schistose structures of rocks, 60-63. 

 Prismatic and columnar structures, 63-69. The spheroidical 

 structure, 69-73. The porphyritic, granular, and amygdaloidal 

 structures, 73-80 



Roussillon, wines of, 128 



Royal Society, analysis of the philosophical transactions of, 136- 

 144. Proceedings of, 323-327. Analysis of the anniversary 

 discourse of the president, 327-331. List of its officers for the 

 current year, 331, 332 



(S'caZes of iron, composition of, 387, 388 



Seeds, preservation of, 411 



Selenium, discovered in the volcanic rocks of Lipari, 173 



Sennaar, account of the country of, 302, 303. 



Serullas (M.,) process of, for obtaining cyanuret of iodine, 173 



Shell, effects of the induced magnetism of an iron one upon the 

 rates of chronometers, 34-47. 



Ships of War, having square and curvilineal sterns, results of ex- 

 periments relating to the comparative means of defence afforded 

 by, 201-223. 



Silicium, process for procuring, 156, 157 



Silvester (Mr.,) account of his mode of warming and ventilating the 

 infirmary at Derby, 337, 338. Smoke, method of condensing, 

 described, 270, 271 



Soap, potatoes a substitute for, 165, 166 



Sodalite, effect of light on the colour of, 179 



Solutions, saturated, boiling points of, 89-91 



Sound, results of experiments on the velocity of, 162, 163 



South (James) astronomical phenomena for the months of October, 

 November, and December, 1824, 81-89 



Spain, remarks on the wines of, 129, 130 



Specula, coating for, 181 



