INDEX. 



471 



Hydrogen, phosphuretted, composition 



of, S08. 

 Insects : — coleopterous, new genera and 

 species of, 151 ; hymenopterous, de- 

 scription of new British forms 

 amongst, 342. 

 Iodides of platina and their compounds, 



384. 

 Iron, cast, cohesion of, 79; crystallized 



pernitrate of, 467. 

 Ivory (J.) on the disturbing function, 



459. 

 Jupiter, Prof. Airy on the mass of, 283. 

 Knight (Dr. W.) on the vibration of 



heated metals, 239. 

 Knight ( T. A. ) on the powers of suc- 

 tion of the common leech, 449. 

 Lagotis, a new genus of the family of 



Chinchillidae, 149. 

 Lardner ( Dr.) on certain properties of 



vapour, 38. 

 Lassaigne (M.) on the iodides of pla- 

 tina and their compounds, 384. 

 Lead and bismuth, separation of, 389. 

 Leech, common, on the powers of suc- 

 tion of, 449 ; on the respiratory or- 

 gans of, 456. 

 Lens, crystalline, on the, 5, 446. 

 Light : — homogeneous, method of ob- 

 taining, 35; on the inflection of, 172, 

 412; on the Velocity with which it 

 traverses transparent media, 333 ; on 

 its absorption by coloured media, 401 . 

 Lime, its action on solutions of car- 

 bonate of potash, 314. 

 Limnanthes, a new genus of plants, 70. 

 Linnaean Society, 69. 

 Lubbock (J. W.) on the tides, 129, 143. 

 Lunar Occultations, 159, 319,399,467. 

 MacCullagh (J.) on conical refraction, 

 114, 197; on a difficulty in the the. 

 oryof the attraction of spheroids, 282. 

 Magnetism, terrestrial, 215. 

 Magneto-electricity : — on certain ex- 

 periments in, 18 ; on the law which 

 connects the various phenomena dis- 

 covered by Dr. Faraday, 37 ; elec- 

 trical phasnomena elicited by, 40; 

 on the laws of magneto-electric in- 

 duction, 141. 

 Magnets : — power of an electro-magnet 

 to retain its magnetism, J 22; curious 

 properties of common and electro- 

 magnets, 124. 

 Metalliferous veins, on the electro- 

 magnetism of, 16, 17. 

 Metals, on the vibration of heated, 321. 

 Meteor, extraordinary, seen at Mal- 

 vern, 37. 

 Meteorological table: — for May, 80; 

 June, 159; July, 240; August, 320; 

 September, 400 ; October, 468. 



Meteorology, on the progress of, 131. 

 Microscope, a new object for the, 318. 

 Minerals of the North of Ireland, 83. 

 Minium, on, 125. 



Moseley (Rev. H.) on a new principle 

 in Statics, 285 ; on the theory of re- 

 sistances in Statics, 431. 

 Muller (Dr.) on the existence of four 

 distinct hearts in certain amphibious 

 animals, 41. 

 Murchison (R. I.), his address to the 

 Geological Society, 42; on the se- 

 dimentary deposits of Shropshire, 

 Herefordshire, &c, 224. 

 Murphy (Mr.) on the inverse method 



of definite integrals, 461. 

 Nervous and muscular systems in ani- 

 mals, on the, 40. 

 Obituary : Thomas Allan, Esq., 317 ; 



Edward Collins Giddy, Esq., 467. 

 Ocean, method of ascertaining the 



depth of, 82, remarks on, 352. 

 Ogilby (Mr.) on a new genus of Car- 



nivora, called Cynictis, 67. 

 Oil of bitter almonds, composition of, 



389. 

 Olivile, analysis of, 381. 

 Optics and perspective, new instrument 



as a means of instruction in, 464. 

 Ornithorynchus, on the mammary 



glands of the, 60, 62, 301. 

 Owen ( It.) on the mammary glands of 



the Ornithorynchus, 14. 

 P. M. on magneto-electricity and elec- 

 tro-magnetism, 18. 

 Paper, hydrographic, 466. 

 Patent laws, proposed modification of, 



316. 

 Peroxide of bismuth, 387. 

 Perspective, a new instrument as a 



means of instruction in, 464. 

 Petherick (T.) on the electro-magnet- 

 ism of metalliferous veins of a cop- 

 per mine in Ireland, 16. 

 Philip (Dr. A. P.W.) on the nervous 

 and muscular systems in animals, 40 ; 

 on the nature of sleep, 143. 

 Phillips (R.) on minium, 125; analysis 

 of two sulphureous springs near 

 Weymouth, 158; on the use of che- 

 mical symbols, 443. 

 Phosphovinic acid, and phosphovinates, 



73. 

 Phosphurets, metallic, 310. 

 Phosphuretted hydrogen, composition 



of, 308. 

 Phrenology, early anticipation of, 308. 

 Piperine, M. Pelletier on, 313. 

 Platina, the iodides of, and their com- 

 pounds, 384. 

 Potash, carbonate of : — from plants, 72 ; 

 action of lime on solutions of, 314. 



