54-8 



INDEX. 



Calvert (Rev. F.) on the elements of 

 planegeometricaltrigononietry,455. 



Cambridge Philosophical Society, 

 proceedings of the, 135, 225, 

 455. 



Cayley (A.) on the theory of permu- 

 tations, 527. 



Challis (Rev. J.) on the mathematical 

 theory of aerial vibrations, 8S, 225 ; 

 on the method in use at the Cam- 

 bridge Observatory of measuring 

 differences of right ascension and 

 north polar distance, 138; on the 

 transmission of light through trans- 

 parent media, 225 ; on the aurora 

 boreahs of Nov. 17, 1848, 226; on 

 the theoretical value of the velocity 

 of sound, 284, 353; on spherical 

 waves in an elastic fluid, 449 ; on 

 some points relating to the theory 

 of fluid motion, 512. 



Chelonian reptiles, on the develop- 

 ment and homologies of the cara- 

 pace and plastron of the, 307. 



Chloride of silver, on the solubility of, 

 in hydrochloric acid, 152. 



Chloroform, action oiF, on the sen- 

 sitive plant, 130. 



Chloroniceic acid and chloroniceates, 

 on the, 473. 



Clock-escapements, observations on, 

 455. 



Cockle (Jas.) on a new imaginary in 

 algebra, 37; on two geometrical 

 problems, 132; on the symbols of 

 algebra, and on the theory of tessa- 

 rines, 406. 



Colours, hints towards a classification 

 of, 161. 



Copper, on the presence of, in the 

 human blood, 155; on a new dou- 

 ble salt of the sulphate of, with sul- 

 phate of potash, 475. 



Crystals, on the magnetic relations of 

 the positive and negative optic axes 

 of, 450. 



Cubic, on the expression for the roots 

 of a complete, 193. 



Curve, on the intrinsic equation to a, 

 457. 



Curves, epicyclical, on an easy rule for 

 formuhzing all, 444, 520. 



Dairy mple (J.) on an infusoiy ani- 

 malcule allied to the genus Notom- 

 mata, 529. 



Damour (M. A.) on faujasite, 394. 



Davies (T. S.) on numerical transfor- 

 mation, 347. 



Dawes (Rev.W. R.) on the transit of 

 Mercury, 141. 



Debus (M.) on madder, 236. 



Delesse (M.) on the protogine of the 

 Alps, 233. 



Dell (Mr. T.) on the transit of Mer- 

 cury, 142. 



Denison (E. B.) on clock escapements, 

 455. 



Desains (M. P.) on the reflexions of 

 different kinds of heat by metals, 

 471. 



Deschamps (M.) on the presence of 

 copper in the human blood, 155. 



Dessaignes (M.) on the formation of 

 carbonate of lime from the neutral 

 malate of lime, 156. 



Deville (M.) on anhydrous nitric acid, 

 314. 



Diamagnetism, experiments on, 81. 



Domeiko (M. J.) on the vanadiate of 

 lead and the double vanadiate of 

 lead and copper, 395. 



Drach (S. M.) on an easy rule for for- 

 mulizing all epicyclical curves with 

 one moving circle by the binomial 

 theorem, 444, 520, 



Draper (Dr. J. W.) on the existence 

 and effects of allotropism in the 

 constituent elements of living be- 

 ings, 241. 



Duhamel (M.) on the multiple sounds 

 of bodies, 415. 



Dumas (M.) on liquid protoxide of ni- 

 trogen, 153. 



Electricity, experimental researches 

 in, 75. 



Electro- physiology, researches in, 440. 



Equations, on improvements in the 

 analysis of, 413 ; on the integration 

 of linear differential, 530. 



, numerical, on a new me- 

 thod of finding the rational roots of, 

 457. 



Erythromannite, on some nitrogen 

 compounds of, 465. 



Ethylamide, on the preparation and 

 composition of, 318. 



Faraday (M.) on the crystalline pola- 

 rity of bismuth and other bodies, "Jb. 



Faujasite, analysis of, 394. 



Felsite, analysis of, 237. 



Fluid motion, on the theory of, 512. 



Fluorine, on the equivalent of, 160. 



