558 



INDEX. 



silver with metallic minerals, and 

 methods of extracting it, 153; on 

 the presence of lead, copper, and 

 silver in sea- water, and of the last 

 metal in organized beings, 156. 

 Matteucci's (C.) electro-physiological 

 researches, 468. 



Maumene (M.) on the theory of com- 

 plementary colours, 403 ; on a nev/ 

 reagent for ascertaining the pre- 

 sence of sugar in certain liquids, 

 482. 



Mediterranean, analysis of the waters 

 of the, 404. 



Melsens (M.) on a new process for 

 extracting sugar from the sugar- 

 cane, 62. 



Meteor of Feb. 11, 1850, some account 

 of the, 221, 249; notice of a, 318 ; 

 of Nov. 5, 1849, observations on 

 the, 381. 



Meteorite in North Carolina, account 

 of a, 240. 



Meteorological observations, 7Q, 159, 

 247, 327, 407, 487. 



Mineralogy: — Schorlamite, 21; chlo- 

 rite, 22; lepidolite, ih.; glaukodote, 

 23 ; embolite, ih. ; lonchidite, 24 ; 

 konichalcite, ih. ; glaucolite, 25 ; 

 arkansite, ih. ; Brookite, ib. ; smec- 

 tite, 27 ; Lettsomite, 100 ; Percy - 

 lite, 131 ; Francolite, 134 ; granular 

 albite, 319; Brongniardite, 477; 

 nemalite, 552 ; pectolite, 553 ; stel- 

 lite, ib. 



Mitchel (O. M.) on the velocity of 

 the electrical wave or current 

 through a metallic circuit, 284. 



Mulder (M.), analysis of tin from the 

 mines of Banca, 324. 



Nemalite, analysis of, 552. 



Nickel, on some new compounds of, 

 406. 



Nile, journey to discover the sources 

 of the, 151 ; analysis of the mud of 

 the, 325. 



Nitroprussides, on the, 197, 271, 

 348. 



Oil of elemi, on the, 243 ; of turpen- 

 tine, on the action of hydrochloric 

 acid on the hydrates of, 66. 



Ozone, experiments on, 398. 



Paget (J.) on the freezing of the albu- 

 men of eggs, 541. 



Panopticon of science and art, 327- 



Paratartaric acid, observations on, 78. 



Payen (M.) on the analysis of the 

 mud of the Nile, 325. 



Pectolite, analysis of, 553. 



Percy (Dr. J.) on the extraction of 

 gold and silver from their ores by 

 the wet way, 1 ; on Lettsomite (velvet 

 ore), 100; on Percylite, 131. 



Percylite, chemical examination of, 1 34. 



Phantascope, experiments with the, 

 453. 



Phillips (Reuben) on the connexion of 

 the electricity of condensation with 

 lightning and the aurora, 103, 303, 

 503. 



Phosphoric acid, on a series of inso- 

 luble salts of, 320. 



Plants, freshwater, on the existence 

 of iodine in, 486. 



Plateau (M.J.) on a new and curious 

 application of the permanence of 

 impressions on the retina, 434, 436. 



Platina, on the discovery of, in the 

 Alps, 323. 



Plattner (M.) on glaukodote, 23 ; on 

 embolite, ih. 



Playfair(Dr. L.)on the nitroprussides, 

 a new class of salts, 197, 271, 348. 



Pliicker (Prof.) on M. Boutigny's 

 recent experiment, 137. 



Poinsot (M.) on the analysis of the 

 mud of the Nile, 326. 



Potter (Prof.) on the supposed inver- 

 sion of hydrostatical principles in 

 the casting of specula for reflecting 

 telescopes, 13. 



Powell (Prof.) and Dr. Whewell, 235. 



Quaternions, on the calculus of, 135, 

 305, 379 ; on the geometrical in- 

 terpretation of, 489. 



Rammelsberg (M.) on schorlamite, 

 21 ; on chlorite, 22 ; on arkansite 

 and Brookite, 25. 



Regnault's (M.) Relation des Experi- 

 ences pour determiner les princi- 

 pals lois physiques, reviewed, 41 ; 

 on the measurement of tempera- 

 tures by thermo-electric currents, 

 410. 



Retina, on a curious application of 

 the permanence of impressions on 

 the, 434, 436 ; and optic nerve, on 

 the development of the, 546. 



Reynoso (M. A.) on the estimation of 

 lime, 157 ; on new compounds of 

 ammonia with ferrocyanide and 

 ferridcyanide of nickel, 406. 



