564 



INDEX. 



Germany, on the wealden of, 401. 



Giraffe, account of the birth of a, at the 

 Zoological Society's garden, 79, 546. 



Goddard (J. F.) on the polarization 

 of light by living animals, 152. 



Gold, on the assay of, 310. 



Graphite, on, 419. 



Graves (J. T.) on the porismatic ar- 

 rangement of points, 129. 



Griffith (R.) on the geological rela- 

 tions of the rocks of the south of 

 Ireland, 536. 



Grove (W. R.) on the inaction of 

 amalgamated zinc in acidulated wa- 

 ter, 81; on a new voltaic battery of 

 great energy, 287. 



Gulliver (G.) on blood corpuscles in 

 the mammalia, 495. 



Gyranotus, on the electric force of the, 

 358. 



Hailstones, analysis of, 252. 



Hake (Dr.) on the structure and func- 

 tions of the spleen, 329- 



Halliwell (J. O.) on the mathematical 

 collections of Pappus Alexandrinus, 

 85 ; Rara Mathematica, notice of, 

 242 ; account of a few notices of 

 America by middle- age writers, 284 ; 

 on the Boetian and Arabic nume- 

 rals, 447. 



Hare (Dr.) on the fusion of platina, 

 487 ; on a new sether, 488. 



Hamilton (C. W.) on the older rocks 

 of Kiliarney and Dublin, 442. 



Harris (W. S.) on the elementary 

 laws of electricity, 320 ; on light- 

 ning conductors, and on certain 

 principles in electrical science, 461. 



Hawkshaw (J.) on fossil trees found 

 in the excavations for the Manches- 

 ter and Bolton Railway, 539. 



Heat, on the polarization of, 380. 



Heat and light, reflected, on the in- 

 tensity of, 479. 



Hering (M.), action of chloride of tin 

 on sulphurous acid, 156. 



Herschel (Sir J. F. W.),his directions 

 for taking hourly observations of 

 the barometer, 201. 



Horse, on the maikings of the eel- 

 back dun variety of the, 328. 



Humboldt (Von), his system of simul- 

 taneous observations, 184. 



Hydracids, their action on pyroxylic 

 spirit, 48. 



Hydrogen, bicarburet of, analysis of, 

 63; sulphuretted, 553. 



H ydrogen gas, mode in which some 

 salts act in, 248. 



Hygrometers, 215. 



Ice, on the cause of the holes of, 305. 



India ink, preparation of from certain 

 fungi, 71. 



Indian seas, on tide observations made 

 in, 317. 



Indigo, action of sether on, 334. 



Infusoria, on a leather-like substance 

 composed of, 65. 



Iodine, in coal formations, 411. 



Ireland, on the geology of, 122, 536. 



Iron, cast and malleable, on the dif- 

 ferent species of, 417. 



Irradiation, notice of Plateau's me- 

 moir on, 68. 



Isinglass, its production from Indian 

 fishes, 547. 



Isopodous Crustacea, new genus of, 

 534. 



Italian Scientific Association, meeting 

 at Pisa, October 1839, 550. 



Ivory (J.) on the theory of the astro- 

 nomical refractions, 3, 105, 385, 

 497 ; on the equilibrium of an in- 

 compressible fluid, 322 ; the Royal 

 Medal awarded to, 521. 



Jacobi (Dr.) on various subjects of gal- 

 vanism and electro-magnetism, I6I. 



Johnston (Prof.) on the constitution 

 of the resins, 327- 



Kersten (Prof.) on a leather-like sub- 

 stance composed of infusoria, 65. 



Kiliarney, on the older rocks of, 442. 



Knowledge, on the classification of 

 the different branches of, 473. 



Lactate of urea, 154. 



Lagoons, borax, of Tuscany, 2 1 . 



Laiitanium, notice respecting, 286. 



Lead, chromate of, its employment in 

 the analysis of organic substances, 2. 



Lead, subsesquiacetate of, 155. 



Lepidosiren annectens, description of, 

 72. 



Light, its polarization by living ani- 

 mals,152; on the absorption of, 450. 



Light and heat, reflected, on the inten- 

 sity of, 479. 



Lightning, 220 ; its connexion with 

 rain, 196; lightning conductors, 461 . 



Lima, route from, by the Quebrada 

 of San Mateo, 333. 



Lime, its separation from magnesia, 

 309, 247. 



Lime and alumina, separation of mag- 

 nesia from, 154. 



