548 



INDEX. 



on purreic acid, 321; composition of 

 narcotine and products of its decompo- 

 sition, 363 ; opianic acid, 395 ; silicic 

 aethers, 397 ; on the constitution of the 

 urine, 453 ; oil of gualtheria, 480 ; 

 opianic aither, 482; metallic acids, ib.; 

 new oxide of chromiun, 484 ; inorganic 

 constituents of plants, 500 ; purification 

 of the soluble salts of manganese, 519 ; 

 preparation of fluoride of iodine, 520 ; 

 opiammon, 541 ; chemical examination 

 of vegetable ivory, 543; composition 

 of Umone, 545. 



Clarke (Rev. W. B.) on the great comet 

 of 1 843, as seen in New South Wales, 

 314. 



Coal-gas, on the purification of, 148; ob- 

 servations on, 161. 



Collieries, on the prevention of explosions 

 in, 350. 



Colossochelys Atlas, description of the, 

 532. 



Colour-blindness, observations on, 134. 



Comet of Faye, elements of the, 71, 224. 



Comet of Victor Mauvais, parabolic ele- 

 ments of the, 239. 



Conic sections, on new theorems relative 

 to the, 208. 



Cotarnine, on the preparation and com- 

 position of, 370. 



CroU (A.) on the purification of coal-gas, 

 148. 



Cundell (G. S.) on a combination of lenses 

 for the photographic camera obscura, 

 173, 



Cyanides of the metals, on the, 56, 66. 



Damour (M.) on some arsenites and arse- 

 niates of iron, 74. 



Daniell (Prof. F.) on the electrolysis of 

 secondary compounds, 175, 246. 



Dansey (Lieut.-Col.) on the mode of con- 

 structing the Pyramids, 404. 



Daubeny (Prof. C.) on the occurrence of 

 fluorine in recent as well as in fossil 

 bones, 122 ; on the occurrence of phos- 

 phorite in Estremadura, 216 ; lines of 

 inquiry connected with the theory of 

 agriculture, 384. 



Davy (Dr. J.) on the action of the sun's 

 rays on lithic acid, 142. 



Dawson (J. \V.) on the lower carbonife- 

 rous rocks of Nova Scotia, 214. 



De Morgan (Prof.) on Easter-day 1845, 

 150. 



Descloiseaux (M.) on the composition of 

 peunine, 75. 



Distances, on the measurement of, by the 

 telescope, 141. 



Dodo, on the probable existence of scve- 



, ral struthious birds distinct from the, 

 497. 



Dove's law of storms, observations on, 

 94. 



Draper (Prof. J. W.) on tithonized chlo- 

 rine, 1 ; on Mr. Hunt's book entitled, 

 ' Researches on Light,' 49 ; on the 

 existence of a fourth imponderable, 

 103 ; on Mr. Hunt's researches on 

 light, 119; on the decomposition of 

 carbonic acid by the leaves of plants 

 under the influence of vellow light, 

 169. 



Easter-day 1845, observations on, 150. 



Ebelmen (M.) on siHcic ffithers, 397. 



Egerton (Sir P. Grey) on some fossil fish, 

 223. 



Eifli; (J. S.) on loud beats of clocks used 

 in observatories, 305. 



Electric and magnetic fluids, on the sup- 

 posed properties of, 142. 



Electric induction, on various phaenomena 

 of, 266. 



Electric currents, on the decomposition of 

 the double cyanides by, 379 ; on the 

 transmission of, 540. 



Electrical and chemical actions, on the 

 relation of, before and after completion 

 of the voltaic circuit, 285. 



Electrical tension without metallic con- 

 tact, observations on, 283. 



Electro-chemical decomposition of bodies, 

 on the laws which govern the, 73. 



Electrolysis of secondary compounds, re- 

 searches on the, 175, 246. 



Electro-magnets, on sonorous phaeno- 

 mena in, 382. 



Electro-rotatory points, observations on, 

 344. 



Elias (P.) on a simple method of magne- 

 tizing steel bars, 348. 



Ellipse, spherical, on the rectification and 

 quadrature of, 18. 



Elliptic functions, on the transformation 

 of certain, 352. 



Energiatype, observations on the, 49. 



Euclid's twelfth axiom, observations on, 

 207. 



Falconer (Dr. H.) on some fossil remains 

 of Anoplotherium and Girafl'e, 212; on 

 the osteological characters and palae- 

 ontological history of the Colossochelys 

 Atlas, 532. 



Faye's comet, on the elements of the, 

 224, 302. 



Fibril of the muscle, on the structure of 

 the ultimate, 144. 



Figuier (M. L.) on the properties and com- 

 ])osition of the protoxide of gold, 157, 

 237 ; on the teroxide of gold, 393 ; on 

 the oxides and some other compounds 

 of gold, 315 ; on the purple powder of 

 Cassius, 392. 



