558 



INDEX. 



Laurent (M.) on the composition of 

 orcine and its derivatives, 322 ; on 

 sulphomorphide and sulphonarco- 

 tide, 396. 



Lead, on the detection of, in the pre- 

 sence of bismuth in blowpipe ex- 

 periments, 319. 



Lecanoric acid, observations on, 250. 



Lefort (M. J.) on metallic carbonates, 

 401. 



Lenses, on a simple and ready way of 

 producing tools for grinding, 480. 



Lepage (M.) on the distilled waters 

 Of the cherry-laurel and bitter 

 almonds, 399. 



Lichens, on the proximate principles 

 of, 249. 



Liebigite, on the composition of, 79. 



Light, on a new case of the inter- 

 ference of, 155 ; on the intensity of, 

 in the neighbourhood of a caustic, 

 311; on a new instrument for 

 measuring the intensity of the che- 

 mical action of the rays of, 329. 



Lloyd (Rev. H.) on a method of de- 

 termining the total intensity of the 

 earth's magnetic force in absolute 

 measure, 212. 



Lubbock (Sir J. W.) on some methods 

 of developing any function of sines 

 and cosines, 107. 



Luminous rings, on the phaenomenon 

 of, in calcareous spar and beryl, 490. 



Lunar eclipse of March 19th, 1848, 

 observations on the, 243. 



Lysaght (Major) on the annular eclipse 

 of November 9, 1847, 159. 



M'Coy (F.) on some new fossil fish of 

 the carboniferous period, 311. 



Madder, on the colouring matters of, 

 133, 282. 



Magic square of the knight's march, 

 on the, 101, 247. 



Magnetic force, account of a method 

 of determining the total intensity 

 of the earth's, 212. 



Manganese, on some phosphates of 

 the protoxide of, 551. 



Mantell (G. A.) on some belemnites 

 and other fossil remains of Cepha- 

 lopoda, 61 ; on the structure of 

 the jaws and teeth of the Iguano- 

 don, 156. 



Matter, remarks on the theory of, 393. 



Mayne (Rev. C.) on the lunar eclipse 

 of March 19, 1848, 243. 



Medjidite, on the constitution of, 79- 



Melissic acid, on the preparation and 

 composition of, 548. 



Melville's (Dr. A. G.) Dodo and its 

 Kindred, reviewed, 467. 



Mengarduque (M.) on pseudoquine, 

 323. 



Mercury, on the preparation of the 

 black sulphuret of, 486. 



Meteorological observations, 79, 167, 

 247, 327, 407, 487. 



Meyer (C.) on the separation of anti- 

 mony from arsenic, 320. 



Milky Way, observations on the, 231. 



Miller (J. F.) on the meteorology of 

 the Lake district of Cumberland 

 and Westmoreland, 156. 



Mineralogy: — chrysotil, 76; Medji- 

 dite and Liebigite, 79 ; uranite, 397 ; 

 chalkolite, 398 ; epidote, 483 ; zoi- 

 site, 484 ; pistazite, 485 ; Buck- 

 landite, 486 ; orthite, 486 ; native 

 sulphuret of molybdenum, 544 ; 

 columbite, 553 ; alluaudite, 554. 



Molybdenum, on some compounds 

 of, 409 ; on the atomic weight of, 

 524. 



Moon, on a self-luminous spot in the, 

 74 ; on some remarkable appear- 

 ances during the total eclipse of the, 

 March 19, 1848, 160, 243. 



Morphine, on a new substance derived 

 from, 396. 



Myricine, on the composition and 

 products of decomposition of, 548. 



Namur (M.) on the ashes of turnip 

 leayes, 78. 



Narcotine, on a new substance derived 

 from, 396. 



Nile, notice of Dr. Bialloblotzky's 

 journey to the sources of the, 481. 



Nitracrol, on the preparation and com- 

 position of, 82. 



Nitropicric acid, on some products of 

 the decomposition of, 54. 



Nobili's coloured rings, on the theory 

 of, 7- 



ffinanthal, on the compounds and 

 products of the decomposition of, 

 81. 



GSnanthylic acid, on the constitution 

 of, 83. 



Oils, fixed, on certain phaenomena of 

 capillary attraction exhibited by, 36. 



, essential, researches on, 165. 



Optical phenomena, on some, 345. 



