.548 



INDEX. 



terbium and yttria, 241 ; on changes in 

 the composition of milk, 281 ; non- 

 precipitation of lead from sulphuric 

 acid, 314 ; octahedral crystallization of 

 iodide of potassium, 317; presence of 

 tin in sulphuric acid of commerce, 317 ; 

 oxidizing action of chlorate of potash, 

 318; on panary fermentation, 321 ; pre- 

 paration of malic acid from the garden 

 rhubarb, 327 ; on astringent substances, 

 331 ; on the changes in colour exhi- 

 bited by solutions of chloride of copper, 

 367 ; preparation of aether, 386 ; action 

 of sulphurous acid on metallic oxides, 

 397, 545 ; production of iodoform, 398 ; 

 preparation and constitution of theine, 

 426 ; products of the decomposition of 

 amber, 477 ; sub-salts of copper, 496 ; 

 spontaneous change of fats, 505. 

 Chlorate of ammonia, spontaneous de- 

 composition of, 75 ; of potash, on the 

 oxidizing action of, 318. 

 Chloride of copper, on the changes in 



colour exhibited by solutions of, 367. 

 Chrysene, composition of, 479. 

 Chrysorhamnine, composition of, 4. 

 Clegg's (Mr.), differential dry gas light 



meter, account of, 388. 

 Close (M.) on the great comet of 1843, 



147. 

 Coal-fields of North America, observa- 

 tions on the, 181. 

 Cock (W. J.) on palladium, 16. 

 Colouring matter of the Persian berries, 



on the, 3. 

 Comet of 1843, observations respecting 

 the, 147, 148, 149, 151,152, 311,472. 

 Cooper (J. H.) on fossil bones found in 



Georgia, 189. 

 Cooper (J. T.) on improvements in the 

 instrument for ascertaining the re- 

 fracting indices of bodies, 509 . 

 Copper, on the constitution of the sub- 

 salts of, 496. 

 Cowdie pine resin, examination of the, 81. 

 Cowper (H. A.) on the comet of 1843, 



150. 

 Crustacea, on the organ of hearing in, 383. 

 Curves, on the application of a new me- 

 thod to the geometry of, 338. 

 Cyanogen, on some new combinations of, 

 157 ; on a new process for preparing, 

 179. 

 Cymophane, analyses of, 77. 

 Daguerreotype, observations on, 1 75. 

 Dammaran, composition of, 85. 

 Dammaric acid, composition of, 83. 

 Dammarol, composition of, 86. 

 Dammarone, composition of, 87. 

 Damour ^M. A.) on new analyses of the 



cymophane of Haddam, 77. 

 Daniell (Prof.) on the existence of a 



compound radical in certain sulphates 

 203. 

 Didymium, observations on, 241. 

 Drach (S. M.) on the diurnal tempera- 

 ture of the earth's surface, 49 ; on the 

 places of Saturn computed by Hansen's 

 formula, 299. 



Draper (W.) on the decomposition of 

 carbonic acid gas and the alkaline car- 

 bonates by the light of the sun ; and 

 on the tithonotype, 161, 356; on a 

 change produced by exposure to the 

 beams of the sun in the properties of 

 an elementary substance, 388 ; descrip- 

 tion of the tithonometer, 401. 



Dupasquier (M.) on the non-precipita- 

 tion of lead from solution in sulphuric 

 acid, 314 ; on the presence of the sul- 

 phate of tin in the sulphuric acid of 

 commerce, 317. 



Earth, on the diurnal temperature of the 

 surface of the, 49. 



Ebelman (M.) on the composition of 

 pechblende, 475 ; on the composition 

 of wolfram, 477. 



Electric and nervous influences, on the 

 analogy between the phaenomena of, 

 41. 



Electric currents in Pennance Mine, ex- 

 periments on the, 457, 491. 



Electricity, on a method of etching on 

 hardened steel plates by, 106. 



, on the relations which connect 



light with, 254. 



of steam, observations on the, 



194. 



Electrified bodies, on the cooling of, 260. 

 Ellipse, method of proving the three 



leading properties of the, 48. 

 Entozoon folliculorum, on the structure 



and development of, 368. 

 Equations, numerical, new criteria for 



the imaginary roots of, 450. 

 Erbium, observations on, 251. 

 Evans (W. J.) on the structure of the 



spleen in man and other animals, 370. 

 Everest (R.) on the high temperature of 



wells near Delhi, 302. 

 Everitt (T.) on garden rhubarb as a 



source of malic acid, 327. 

 Eucalyptus, on the sugar of the, 14. 

 Farre (A.) on the organ of hearing in 



Crustacea, 383. 

 Fat, formation of, in the animal body, 19; 



on the spontaneous change of, 505. 

 Fitzgerald (Capt.) on the accident by 



lightning to Government-house, Cal- 

 cutta, 177. 

 Flour of different countries, on the nu- 

 tritive values of, 321. 

 Fordos (M.) on the action of potassium, 



sodium, and zinconsulphurousacid,545. 



