5±8 



INDEX. 



Bussy (M.) on the extraction of iodine 

 from plants and from coal, 317- 



Cambridge Philosophical Society, pro- 

 ceedings of the, 68, 146, 230, 468. 



Campbell (D.) on the action of the 

 soap-test upon water containing a 

 salt of magnesia only, and likewise 

 upon water containing a salt of 

 magnesia and a salt of lime, 171; 



Carbon, on the application of, depo- 

 sited in gas retorts, as the negative 

 plate in the nitric acid voltaic bat- 

 tery, 219; on the action of, on 

 metallic solutions, 313; on a new 

 reagent for oxide of, 315. 



Catapleite, analysis of, 235. 



Cay ley (A.) on the triadic arrange- 

 ments of seven and fifteen things, 50. 



Chalk flints, on the occurrence of, in 

 Aberdeenshire, 430. 



Chances, on the doctrine of, 401. 



Chapman (Prof. E. J.) on the identity 

 of breislakite and augite, 444 ; on 

 the employment of right rhom- 

 boidal prisms in crystallography, 

 446. 



Chlorine, sulphur and oxygen, new 

 compound of, 474. 



Citridic, aconitic, and equisetic acids, 

 identity of the, 397- 



Clare (P.) on some thunder-storms 

 and extraordinary electrical pheno- 

 mena, 329. 



Coal, on the extraction of iodine and 

 bromine from, 317- 



Cockle (J.) on impossible equations, 

 on impossible quantities, and on 

 tessarines, 281 ; on the theory of 

 equations, 493. 



Codeia, on the preparation and 

 analysis of, 475. 



Conies, on a porismatic property of 

 two, 438. 



Coracite, analysis of, 153. 



Corenwinder (M.) on the compounds 

 of iodine and phosphorus, 234. 



Cox (H.) on the curvature of imper- 

 fectly elastic beams, 151. 



Crocodilian reptiles, on the communi- 

 cations between the tympanum and 

 palate in the, 67 . 



Crossley (R.) on algerite, a new mine- 

 ral species, 179. 



Crystallography, on the employment 

 of right rhomboidal prisms in, 446. 



Crystals, on the magneto-optic pro- 



perties of, 1 ; application of the 

 principle of elective polarity to, 21 ; 

 on a cause of variation in the angles 

 of, 316. 



Curr (J.) on the temperature of steam 

 and its corresponding pressure, 304. 



Curves, on the intrinsic equation of, 

 470. 



Daturine, on the preparation of, 544. 



Davies (T. S.) on geometry and geo- 

 meters, 198. 



Definite integrals and infinite series, 

 on the numerical calculation of a 

 class of, 68. 



De Morgan (Prof.) on the symbols 

 of logic, the theory of the syllo- 

 gism, and in particular of the co- 

 pula, and the application of the 

 theory of probabilities to some ques- 

 tions of evidence, 146 ; on the sin- 

 gular solution of a differential equa- 

 tion of the first order between two 

 variables, 232. 



Dessaignes (M.) on the production of 

 succinic acid by fermentation, 397. 



Diamagnetic bodies, on the polar or 

 other condition of, 88; on some 

 phenomena presented by, 241, 545. 



Diamagnetism and magnetism, on the 

 relation of, to molecular arrange- 

 ment, 1. 



Dresser (C. L.) on the application of 

 carbon deposited in gas retorts as 

 the negative plate in the nitric acid 

 voltaic battery, 219. 



Du Bois-Reymond (M.) on electro- 

 physiology, 318. 



Dust-storms of India, on the, 155. 



Earth, conductibility of the, for elec- 

 tricity, 390. 



Economy, political, on some doctrines 

 of, 468. 



Eggs, on the discoloration of silver by 

 boiled, 477- 



Electrical machine, on a new, 428. 



phenomena, on some extra- 

 ordinary, 329. 



Electricity, experimental researches 

 in, twenty-third series, 88 ; conduc- 

 tibility of the earth for, 390. 



■ , atmospheric, effects of, upon the 



wires of the magnetic telegraph, 78. 



Electro-magnetism as a motive power, 

 on, 238. 



Electro-physiology, observations on. 

 318. 



