LOND. AND EDIN. PHILOSOPHICAL MAGAZINE, 1832 1838. 53 



Sylvic acid, examination of, xi. 164. 

 Symbolic notation, on, viii. 101. 

 Symmetrizingpoweroftheeye,x.234,370. 

 Syngamus trachealis, x. 253. 

 Syngnathus Acus and Typhle, vi. 383. 

 Syria, on the earthquake in, xi. 204. 



TW. W. on the visibiUty of the retina, 

 • V. 354. 



Tabuloscriptive engine, x. 486. 



Tadpoles, mode of closure of the gill-aper- 

 tures in, xii. 527. 



Talbot (H. F.) on chemical changes of 

 colour, ii. 359 ; on an optical phaeno- 

 menon seen in Switzerland, ii. 452 ; 

 method of obtaining homogeneous 

 light of great intensity, iii. 35 ; pro- 

 posed philosophical experiments, iii. 81 ; 

 remarks on, iii. 204, 352 ; on facts re- 

 lating to optical science, iv. 112, 289 ; 

 ix. 1, 401 ; on the arcs of the equilateral 

 hyperbola, iv. 225 ; experiments on 

 light, V. 321; vii. 113, 157; on the 

 arcs of certain parabolic ciu"ves, v. 455 ; 

 on the repulsive power of heat, viii. 

 189 ; on the integral calculus, viii. 549 ; 

 X. 210; on the optical phaenomena of 

 crystals, ix. 288 ; x. 218 ; experiment 

 on the interference of light, x. 364 ; 

 on a new property of nitre, xii. 145 ; on 

 a new property of the iodide of silver, 

 xii. 258. 



Tannin, its action on the roots of plants, 

 V. 157. 



Tartaric acid, isomeric modification of, i. 

 83; distillation of, V. 397; constitution 

 of, xii. 381. 



and paratartaric acid, xii. 605. 



Taylor (J.) on a new rotative steam- 

 engine, vii. 369 ; on the duty of steam- 

 engines in Cornwall, viii. 67 ; on rota- 

 tory steam-engines, viii.*136; on man- 

 ganese ore containing silver, x. 279. 



(PhiUp), discovery of pyroxylic spirit 



by, vu. 395, 427. 



(R.) on the doctrine of the eternity 



of the world, viii. 220, note ; on the 

 frost of the 19th and 20th of January, 

 1838, xii. 303 ; on the destruction of an- 

 cient painted glass, ix. 458, note ; on the 

 history of glass-painting, ix. 456, 459, 

 notes ; notice relative to the " Scientific 

 Memoirs," x. 81. 



(R. C.) on the carboniferous series 



of the United States, ix. 407 ; on a vein 

 of liituminous coal in the island of 

 Cuba, X. 103; on the geology of Hol- 

 guin in Cuba, and the mineral region on 

 the N.E. coast, xi. 17. 



(T.) on two calculi composed of 



cystic oxide, xii. 337 ; on urinary cal- 

 culi, xii. 412. 



Taylor (Mr.) on the solubility of arsenious 

 acid, xi. 482. 



Taylor's theorem, on, vii. 188. 



Tea-plant, natural history of the country 

 where found, xi. 390. ' 



Telegraphs, modern, on, v. 241, 365. 



Telescope, on the invention of, i. 9 ; the 

 interior of the eye reflected on the eye- 

 glass of the, i. 318; account of DoUond's 

 fluid-refracting, ii. 373 ; zenith, twenty- 

 five feet, vi. 373. 



Telescopes, application of the negative 

 achromatic lens to, v. 452. 



Tellurium, on, iv. 75 ; preparation of pure, 

 vii. 539 ; properties of, viii, 84 ; analysis 

 of the sulphoplumbiferous, ii. 404. 



Temperature, mean, of Nicolaieff, i. 132 ; 

 of Sevastopol, i. 259 ; of Sitka, i. 427 ; 

 of Jloulouk, i. 429 ; its influence in pro- 

 ducing vibration in metals, iv. 186 ; of 

 vapours, vii. 159 ; thermometer for de- 

 termining minute differences of, viii. 57 ; 

 of insects, xi. 189 ; subterranean, v. 446. 



TenerifFe, meteorology of, xii. 291. 



Tennantite, analysis of, x. 236. 



Terebratula, on the anatomy of, iv. 302. 



Teredo navalis, vi. 55. 



Terrestrial magnetic intensity, experi- 

 ments on, xi. 58, 254. 



Thames, difference of its level and the sea, 

 i. 187. 



Thehaia, a new alkali in opium, viii. 444. 



Thebaine, composition of, x. 387. 



Thermal spring at Mallow, variations of 

 temperature in, v. 216. 



Thermal springs, temperature of, viii. 551. 



Thermo-electric pha;nomena, on, xii. 295 ; 

 spark, on the, xi. 398. 



Thermo-electricity, on, xi. 304 ; on the 

 theory of, iii. 205, 262, 398; decom- 

 position of water by, xii. 541. 



Thermo-magnetism of single pieces of 

 metal, iii. 392. 



Thermo-multiplier, use of, xii. 545. 



Thermometer: — ^for determining minute 

 differences of temperature, viii. 57 ; 

 fallacy of determining climate by the, 

 viii. 61 ; for measuring refrigeration, 

 viii. 61 ; verification of, viii. 552. 



Thermometers, measurement of heights 

 by, vii. 311. 



Thermometrical diary, specimen of a, xii. 

 489. 



Thetis, recovery of the stores from the 

 wreck of the, iv. 363, 367. 



Thibaut (M.) on the giraffe, ix. 144. 



Thompson (J. V.) on the metamorphosis 

 of the Cirripedes, vi. 373 ; on the me- 

 tamorphoses in theMacroura, viii. 421. 



(L.), method of pieparing iodous 



acid, ix. 442 ; on the solubility of me- 

 tallic oxides and salts in muriate of 



