INDEX TO VOL. XII. 



ilBBOTT (!l.) on the variation of a 

 triple integral, 363. 



Abel, exposition of his argument respect- 

 ing equations of the fifth degree, 1 16. 



Absorption of light, on Von Wrede's the- 

 ory of, 114. 



Acids: — camphoric, 297; citric, 381 ; hy- 

 pophosphomcsitylous, 101; lactic, 142; 

 new, 220 -, retinic, 560; tartaric, 381; 

 paratartaric, 605, 



JEther, sulphurous, on, 474. 



Agnew on the pyramids of Gizeh, 379. 



-S^therine, sulphate of, 474. 



iEthers, action of chlorine on, 297. 



Afzelius (Dr.), notice of the late, 279. 



Air, atmospheric, on the quantity of oxygen 

 in, 401. 



Airy (Prof.) on the parallax of a Lyrae, 

 280; on the intensity of light in the 

 neighbourhood of a caustic, 452. 



Alcohol, a new acid formed by its combus- 

 tion around an incandescent platina wire, 

 220. 



Alkaline nitrates and earthy carbonates, 

 analogy in atomic constitution between, 

 480. 



Alum, a new variety of, 103, 124; chrome 

 alum, new method of obtaining, 218. 



America, South, geology of, 516. 



Ammonia, sulphate of, its action on glass, 

 608. 



Analysis, on the employment of metallic 

 sulphurets in, 137; chemical, 229; of 

 some double salts of mercury, 235. 



Analysing organic compounds, method of, 

 31, 232. 



Andrews (Dr.) on the action of nitric acid 

 upon bismuth, &c., 305. 



Anthon (M.) on the employment of metal- 

 lic sulphurets in analysis, 137. 



Apjohn (Prof.), examination of eblanine, 

 98 ; on the specific heats of the aeriform 

 fluids, 101 ; on a new variety of alum, 

 103, 124. 



Arragonite, on the formation of, 465. 



Arsenical copper, 217. 



Astronomy, determination of the constant 

 of lunar nutation, 110; on the parallax 

 of a Lyrae, 280 ; on a very ancient solar 

 eclipse observed in China, 282 ; on the 

 repetition of the Cavendish experiment 

 for determining tlie mean density of the 

 earth, 283 ; remarkable increase of mag- 

 nitude of the star /j, 521, 526 ; value of 



Third Se7'ies. Vol. 12. 3 



the mass of Uranus, 522 ; longitude of 

 the Edinburgh observatory, 525. 



Atmosphere, constitution of the, 158, 397. 



Atomic constitution, supposed analogy in, 

 between the earthy carbonates and alka- 

 line nitrates, 481. 



Australia, on the quadrupeds of, 95 ; pro- 

 jectile weapon of the Australians, 329. 



Aurora boreal is, Feb. 18, 98 ; at Bermuda, 

 42. 



Austen (R. A. C.) on the geology of De- 

 vonshire, 564. 



Azote, sulphuret of, 134. 



B. D. on the path of the boomarang, 329. 



Babington (C. C.) on the structure of Cus- 

 cuta europaea, 531. 



Baily (F.), description of the Royal Soci- 

 ety's new barometer, 204 ; on the repe- 

 tition of the Cavendish experiment for 

 determining the mean density of the 

 earth, 283. 



Bark, its structure and growth, 54. 



Barometer, new, belonging to the Royal 

 Society, 204. 



Batten (Dr.), notice of the late, 277. 



Becquerel (M.), the Copley medal awarded 

 to, 348. 



Bell (Dr.) geology of Mazunderan, 571. 



Bell (T.) on the genus Galictus, 529. 



Bennett (G.) on the phosphorescence of 

 the ocean, 21 1. 



Bentham (G.) on the Mora tree of British 

 Guiana, 532. 



Benzin, production of, 460. 



Benzoic acid, action of iron at a high tem- 

 perature on, 460. 



Berzelius (M.) on xanthophylle, 135. 



Bibliographical Bulletin, 208. 



Bichromate of the perchloride of chrome, 

 83. 



Birch, structure and growth of the bark of 

 the, 55. 



Bird (G.) on induced electric currents, 

 with a description of a magnetic contact- 

 breaker, 18; on indirect chemical ana- 

 lysis, 229. 



Bismuth, on the peculiar voltaic condition 

 of, 48 ; action of nitric acid upon, 305. 



Blake (J.) on the electrical currents pro- 

 duced during the processes of fermenta- 

 tion and vegetation, 539. 



Blood, on the gases contained in the, 300. 



Bonaparte (C. L.) on the arrangement of 

 the vertebrate animals, 92. 



