17^ INDEX. 



RiGAUD DE l'Isle (M.), memoir of, on the Aiia cattiva, near 

 Rome, iv. 87 



Right hand, why used in preference to the left, ii. 123 



• ' line, geometrical process for the division of, xviii. 157 



Ring-worm, lime-water a cure for, "xiv. 238 



Riode Janeiro, remarks on the climate of, xiv. 41. Meteorolo- 

 gical journal kept at, 42 



Rio de la Plata, extraordinary rise of the xx. 183, 414 



Ripley's "Compound of Alchymie," extract from, ix. 231 



Ritchie (William), account of a new photometer by, xix. 292 



Rive (M. de la), notice of electro-magnetic instruments invented 

 by, xii. 184 



Rivers, observations on the junction of the fresh water of, with 

 the salt waters of the sea, ii. 298 



' on the formation of ice at the bottoms of, v. 268 



Rivesaltes, vineyards of, xviii. 128 



Robertson (Anthony, Esq.), evidence of (with remarks) in the 

 cause of Severn & Co. against the Imperial Insurance Com- 

 pany, X. 325 



RoBiQUET (M.), process for making morphia, iv. 159 



-« experiments of, on the nature of Prussian blue, ix. 179 



•« . observations of, on aroma, x. 109 



•' — notice of the speculations of, on the constitution of the 



ferro-prussiate of potash, xiii. 147 



experiments of, on the volatile oil of bitter almonds, 



XV. 155 

 Rochester, account of a mammoth found near, xi. 20 

 Rock crystal of primitive marble, observations on, xiii. 231 

 Rocks, artificial formation of, vi. 170 



* on the geological structure of, xi. 216 



' on the desquamation of, xiii. 237 



' specimens of, from North America, account of, xv. 1 1 



' of Lake Superior, observations on, xviii. 1, 228. Lami^ 



nated, foliated and schistose, structures of, 60. Prismatic and 



columnar structures, 63. The spheroidical, C&. The porphy-* 



ritic, granular, and araygdaloidai, 73 



