THE PHILOSOPHICAL MAGAZINE AND ANNALS, 1827 — 1832. 47 



Trigonometrical survey, longitudes of 

 the, Dr. Tiarks, iv. 364 ; v. 52. 



Trigonometrical longitudes of Dr. 

 Tiarks, Mr. Ivory on the, iv. 432. 



Triangles, plane, symmetrical properties 

 of, ii. 26. 



Trimmer (J.) on the diluvial deposits of 

 Caernarvonshire, and on the discovery 

 of marine shells in diluvial sand and 

 gravel on the summit of Moel Try- 

 fane, x. 143. 



Tripe (C), observations on a mineral 

 from near Hay Tor, i. 38. 



Tubes formed by lightning, iv. 228. 



Tulley's achromatic microscope, vii.353. 



Turner (Dr.) on chloride of barium, vi. 

 53; viii. 181. 



on a mode of ascertaining the va- 

 lue of manganese ores, ix. 235. 



, chemical examination of the ox- 

 ides of manganese, iv. 22, 96. 



, letter to Mr. R. Phillips on the 



oxides of manganese, vi. 283. 



, Mr. R. Phillips's remarks on, v. 



209; his reply to, v. 254; vi. 283. 



on the volatility of oxalic acid, ix. 



161. 



, chemical examination of wad, viii. 



75. 



on a specimen of varvicite, viii. 



284. 



Tweed, geology of the banks of, ix. 13, 

 85. 



Tyrolese Alps, on the tertiary and se- 

 condary rocks of the, v. 401. 



Ulmium (ulmic acid) and azulmic acid, 

 viii. 226. 



Ulva marina, manufacture of paper 

 from, vii. 236. 



Ultramarine, artificial, iii. 232; iv. 228 ; 

 vii. 244. 



Unio, the genus, observations on, viii. 

 376. 



, six new species of, iv. 372. 



United States, Hassler's plans for a sur- 

 vey of the coast of, vi. 401. 



Unity of plan and of composition in ani- 

 mals, vii. 382. 



Upeneus, ix. 460. 



Uralian platinum, new metals in, ii. 391 . 



Urea, preparation of, vi. 312. 



Ure (Dr.) analysis of gunpowder, viii. 

 384. 



his new system of geology, Prof. 



Sedgwick on, vii. 310. 



on the thermostat, or heat-go- 

 vernor, x. 295. 



Urinary concretions, v. 224. 



Urine, butyric acid in, viii. 297. 



, human, rosacic acid in, vi. 147. 



Utzchneider (Mr.) on Guinand's glass 

 for telescopes, vii. 351. 



Valley of the Thames, vi. 61. 



Valleys, on the excavation of, vii. 210. 

 293. 



, Mr. de la Beche on, vi. 241. 



Valtz's elements of the comet in Pega- 

 sus, viii. 51. 



Vanadiate of ammonia, J. Prideaux's 

 experiments on the, x. 209. 



Vanadium, M. Berzelius on, x. 321 ; xi. 

 7. 



, M. Sefstrom on, x. 151. 



Vaporization, limits to, Mr. Faraday on, 

 viii. 383. 



Vapour, new phsenomena of, iii. 74. 



, theory of, v. 69. 



Variations, on the calculus of, viii. 321. 



Varvicite, Mr. R. Phillips on, vi. 282. 



, Dr. Turner on, vii. 284. 



Varvinsky (Mr.) on iodine and fluosi- 

 licic acid, ii. 426. 



Vauquelin's analysis of Ipecacuanha 

 Branea, iv. 459. 



Vegetable albumen and gelatine, iv. 69. 



fossils, vi. 133 ; viii. 16. 



— — matter, nitrate of silver as a test 

 for, v. 310. 



■ products, analysis of some, iii. 



150; viii. 386. 



, calcareous crystals in the tissues 



of, vi. 147. 



, organic texture of, viii. 76. 



Vegeto-alkalies, electro-chemical de- 

 composition of, ix. 237. 



, new, v. 151 ; vii. 233, 461. 



Veins, mineral, remarks on, vi. 17. 



Velocity of cannon-balls, method of as- 

 certaining, iv. 65. 



of sound, i. 12, 249, 336 ; viii. 60. 



Venus, iv. 392. 



, occultation of, i. 212. 



Vernon's (Rev. W. V.) analysis of an 

 aluminous mineral, v. 178. 



on a discovery of fossil bones near 



North ClifT, vi. 225. 



further examination of the fossil 



bones at North Cliff, vii. 1. 



examination of a crystalline sub- 

 stance from the zinc foundry at Fili- 

 sur, and experiments on some ancient 

 glass beads, vii. 401. 



on the orange phosphate of lead, 



i. 321. 



