18 



GENERAL INDEX OF VOLS. I — 12 OF THE 



the proportion of bromine in the waters 

 of different seas, vi. 321 ; account of 

 the eruption of Vesuvius in 1834, vi. 

 374; on discoveries in volcanic strata, 

 vii. 316 ; on the volatilization of mag- 

 nesia by heat, vii. 406 ; on the action 

 of light on plants, vii. 496 ; viii. 415 ; 

 analysis of a mineral spring near Ox- 

 ford, vii. 518; circular to men of sci- 

 ence relative to mineral waters, vii. 

 541 ; on Sir H. Davy's theory of vol- 

 canos, in reply to Dr. Davy, viii. 249 ; 

 on tlie action of plants upon the at- 

 mosphere, viii. 415. 

 Davidson (J.), notice of, xii. 279. 

 Davidsonite, a new metal in, ix. 156, 



256. 

 Davies (J.) on the spontaneous combus- 

 tion of charcoal, iii. 89. 

 — — (T. S.) on Bernoulli's solution of 

 the problem of shortest twilight, iii. 

 179, 277 ; researches in spherical geo- 

 metry, iii. 366 ; on the employment of 

 coordinates, &c. in the determination 

 of spherical loci, iii. 379 ; geometrical 

 researches concerning terrestrial mag- 

 netism, vi. 302; viii. 418. 

 Davy (Sir H.), electro-chemical theory, 

 subsidiary hypothesis to, viii. 170. 



(Dr.) on the torpedo, i. 67 ; vi. 57 ; 



on the recent volcano in the Mediter- 

 ranean, iii. 148 ; v. 453 ; note on, iii. 

 447 ; on the combinations of carbonic 

 acid and ammonia, iii. 457 ; on the 

 temperature of some fish, vi. 375 ; 

 Prof. Faraday in reply to, vii. 337; 

 viii. 521 ; Dr. Daubeny's reply to, 

 viii. 249. 



(Prof.), experiments to prevent 



corrosion Isy sea- water, vii. S89 ; on 

 nicotin, vii. 393. 

 Dawes (Rev. W. R.), micrometrical 



measures of double stars, v. 302. 

 Dease and Simpson's discovery of the 



North-west passage, xii. 542. 

 Death, on the nature of, iv. 360. 

 DeCandolle (M.) on the conditions of 



germination, reply to, viii. 491. 

 Decomposition, chemical, effected by the 

 magneto-electric current, i. 161. 



, electro-chemical, the nature and 



extent of, iv. 294. 

 Decrepitation, on, ix. 316. 

 De la Beche (H. T.) on the anthracite 

 found near Bideford, vi. 67 ; on the 

 trappean rocks with the new red sand- 

 stone, vii. 513. 

 De la Rive ( Prof.) on an optical phaeno- 

 menon observed at Mont Blanc, xii. 

 122; on the interference of electro- 

 magnetic currents, xii. 122. 

 De la Rue (W.) on voltaic electricity. 



ix. 484 ; on a voltaic battery charged 

 with solution of sulphate of copper, 

 X. 244. 



Del Rio (A.) on Riolite and Herrerite, 

 viii. 261. 



Deluge, Greek traditions of the, iv. 414 ; 

 V. 25. 



Demonville on the diurnal variation of 

 the magnetic needle, xi. 1 94. 



De Morgan ( Prof.) on the relation be- 

 tween the number of faces, edges, and 

 corners in a solid polyhedron, xii. 

 323. 



Denbighshire, Cefn caves in, i. 232. 



Denham (Capt.) on the survey of the 

 Mersey and the Dee, vii. 487 ; on the 

 vibration of railways, viii. 70. 



Denmark, King of, his encouragement 

 of science, i. 16; on the geology of, 

 vii. 412; viii. 553; on some changes 

 of level which have taken place in, xi. 

 309. 



Density of liquids, on the, xii. 1. 



Derbyshire, on the geology of, iv. 66 ; 

 on the limestone and gritstone district 

 of, ix. 173. 



Deshayes (M.), the WoUaston Donation 

 Fund awarded to, viii. 311. 



Despretz (M.) on the maximum density 

 of liquids, xii. 1. 



Detection of foreign matters diffused in 

 the atmosphere, on the, xi. 56. 



Devonshire, geology of, ix. 495 ; x. 388; 

 xii. 510, 564; on the physical struc- 

 ture of, xi. 311; on the subdivisions 

 and geological relations of its old stra- 

 tified deposits, xi. 315 ; Goniatites, xi. 

 317. 



Dew-point, on the, vi. 182 ; ix. 187, 398; 

 vii. 256, 266. 313, 409, 470; on the 

 deduction of the, from the indica- 

 tions of the wet-bulb thermometer, xi. 

 54. 



Diamond, structure and origin of, iii. 

 219; vii. 245; probability of being 

 made, ix. 230. 



Diastase, its action on starch, x. 247. 



Diathermal bodies, transmission of calo- 

 rific rays through, vii. 475. 



Diatomeae, doubtful nature of the, xi. 

 389; siliceous envelopes of the, xi. 389; 

 classification of, xi. 390. 



Dickinson's (Commander) account of 

 the recovery of the stores of the The- 

 tis, iv. 367. 

 Didelphis hortensis, a new species of 



opossum, xii. 215. 

 Diffraction, experiments on, ix. 403. 

 Diffusion, gaseous, xi. 559. 

 Dillenius (Prof.), notice of, viii. 424. 

 Dimorphism of baryto-calcite, vi. 1 ; of 

 chromate of lead, xii. 387. 



