tNiDEX. 173 



lioclis, constituents of, xix. 28. Consolidation of, 32. Different 

 rocks, and the modes of their consolidation, 38. On the ge- 

 neral causes of consolidation, 43. Analogies among, and their 

 resemblance to unconsolidated strata, 200. Formation of con- 

 glomerate, 208. Transitions among, 212. Natural transfer- 

 ence of, and stones, 3G0 



• (moveable), of Salisbury, xx. 162 



Rocking-stone at Savoy, Massachusetts, notice of, xix. 362 



RoGKT (Dr.), explanation of an optical deception by, xix. 298 



Roller pump, notice of a new one, v. 356 



Roman station discovered, v. 383. vi. 174. Cemetry, notice of, 

 ib. Villa at Bignor, 175. Pavement, 176. Coins, ISO. An- 

 cient bridge discovered in Holland, 383. 



Ronalds (F., Esq.), account of an atmospheric electrometer, ii. 

 249. Electric experiments by, on Vesuvius, in June and 

 July, 1819, xiv. 333 



Rooms, on the ventilation of, xiii. 113 



Roots of affected equations, investigation of the methods used for 

 approximating to, xiv. 353 



RoscoE (William, Esq.), discourse of, on the origin and vicissi- 

 tudes of literature and the arts, v. 1. The causes of such vicis- 

 situdes stated, 4. Observations on the studies of literature, as 

 distinguished from the arts and sciences, 13 



Rose (M. G.), observations of, on felspar, albite, labradore, and 

 amorphite, xvi. 106 



notice by, on the composition of aerolites, xx. 185. On the 



combinations of antimony with chlorine and sulphur, 296 



Rose (Mr. H.), on titanium, and its compounds with oxygen and 

 sulphur, xvi. 97. Further experiments on titanium, 381. 

 Titanates, 332. Sulphuret of titanium, 382. On the influ- 

 ence of tartaric acid in certain cases of analysis, 107. On the 

 solubility of substances induced by the tartaric acid, 379 



Ross (Mr.), new porcelain glaze invented by, xi. 392 



Rotation electro-magnetic, historical statement respecting, xv. 

 288. Alteration produced by, on the magnetism of iron plates, 

 253 



