480 



Index. 



Tartrate of potash, crystalline form of, 

 161. 



Temperature, comparative, of Pisa and 

 Penzance, table of, 200. 



Thermoelectric instrument, new one de- 

 scribed, 46. 



Thomson, Dr. on the atomic weight of 

 boracic and tartaric acids, 245. 



Tin trade, ancient, as described by Mr. 

 Hodgson, on the, 175. 



Todd, Dr. notice of his paper on the lu- 

 minous power of insects, 384. 



Traill, Dr. on the detection of small quan- 

 tities of arsenic, 131. 



Transactions of the Royal Society, ana- 

 lyses of, 62, 143,227,298. 



U and V. 



Variation, diurnal, of the barometer, 468. 

 — of the horizontal and dipping 



needle, 183. 

 Vegetable alkalies, composition, according 



to different authorities, 314. 

 Veratria, composition of, 47. 

 Volcanos in activity, account of, 20 1 . 

 Underwood, Mr. on theColiseum at Rome, 



448. 



Uraniate of barytes, analysis of, 261. 



lead, analysis of, 260. 



Uranite from Autun, analysis of, 235. 

 Uranium, on, 253. 



■ oxide of, method of preparing, 



244. 



of, 266. 



salts of, nature and composition 



W. 



M'alker, Mr. on some geometrical princi- 

 ples connected with the trisection of an 

 arc, 356. 



Williams, Dr. on the active power of di- 

 latation of the heart, 181. 



Webster, Dr. analysis of a fragment of a 

 meteor which fell in Maine, 236. 



Woodward, Mr. on the effects of transmit- 

 ting electrical through other fluids, 28'f. 



Wollaston, Dr. notice of his paper on the 

 same decussation of the optic nerves, 

 305. 



Zinc, sulphuret of, analysis of, 337 . 

 Zoological club, proceeding of, 388. 



END OF VOL. VII. 



Printed by C. Baldwin, New Bridge-street, London. 



