422 



Denudation, account of the Derby- 

 shire, i. 402. 



Depolarization of light, on, i. 506 ; ii. 

 4, 7, 33, 39, 50, 92. 



Derbyshire denudation, account of, i. 

 402. 



Detonating compound, new, i. 441, 

 472. 



Diabetes mellitus, non-existence of 

 sugar in the blood of persons labour- 

 ing under, i. 391. 



Diamond, on the nature of the, i. 272 ; 

 on the cutting diamond, ii. 43. 



Digestion, on the function of, ii. 364. 



Digestive organs of animals, i. 243, 

 256, 261, 283, 295, 370, 439, 449, 

 452, 462. 



Dillwyn (L. W.) on fossil shells, ii. 1 98, 

 221. 



Distillation, double, means of producing 

 by the same heat, i. 513. 



Dollond (G.), account of a micrometer 

 made of rock crystal, ii. 141 ; ac- 

 count of the transit instrument made 

 for the Cambridge Observatory by, 

 ii. 246. 



Donovan (M.) on a new vegetable acid, 

 with observations on malic acid, ii. 22. 



Drummond (Lieut. T.) on the means 

 of facilitating the observation of di- 

 stant stations in geodaetical opera- 

 tions, ii. 277 ; on the illumination 

 of light-houses, ii. 411. 



Dugong, account of the, ii. 126, 129, 

 134, 147 ; on the peculiarities that 

 distinguish it from the manatee, ii. 

 152. 



Dulong(M.), remarksonthe hypophos- 

 phorous acid of, ii. 96 ; correction of 

 the formula representing the velo- 

 city of sound, derived from his ex- 

 periments on the specific heat of 

 gases, ii. 401. 



Dunlop (J.), catalogue of nebulae and 

 clusters of stars in the southern 

 hemisphere, ii. 334. 



Dupin (M. C.) de la structure des 

 vaisseaux Anglais, ii. 62. 



Dutch frigate, the Ambuscade, account 

 of the sinking and mode of raising, i. 

 124. 



E. 



Ear: on the membrana tympani of, i. 

 1 ; on the effects which take place 

 from the destruction of the mem- 



brana tympani of, i. 10, 62 ; the 

 physiology of the stapes, i. 188; on 

 the ear of the dugong, ii. 126; on 

 sounds inaudible by certain ears, ii. 

 133 ; difference between the human 

 membrana tympani and that of the 

 elephant, ii. 181. 



Ear-cockle (or purples,) in wheat, on 

 the Vibrio tritici, the cause of that 

 disease, ii. 179. 



Earle (Sir J.), account of a calculus of 

 uncommon magnitude, i. 339. 



Earle (H.) on the re-establishment of 

 a canal in the place of a portion of 

 the urethra which had been de- 

 stroyed, ii. 149 ; on the mechanism 

 of the spine, ii. 170. 



Earth : ellipticity of the, ii. 165, 194 ; 

 figure of the, i. 413, 435 ; ii. 118, 

 140, 290 ; observations with the in- 

 variable pendulum for determining 

 the compression of, ii. 396 ; on the 

 density of, ii. 107, 148 ; on the exist- 

 ence of a limit to the atmosphere of, 

 ii. 160. 



Earths: on the affinities they have 

 been supposed to have for each other 

 in the humid way, i. 88 ; on the de- 

 composition of, i. 313, 353 ; ii. 338. 



Earth-worm, on the organs of genera- 

 tion of, ii. 189. 



Eau medicinale of Husson, a vinous 

 infusion of the Colchicum autumnale, 

 ii. 41. 



Ecliptic, observations for determining 

 the obliquity of the, ii. 114. 



Eel, on the double organs of generation 

 of, ii. 188. 



Egg, on the changes it undergoes during 

 incubation, ii. 172, 175; sex not 

 given at a very early period of their 

 growth, ii. 347. 



Egyptian ibis, mummies of the, i. 201. 



Egyptian mummies, on, ii. 240. 



Elastic fluids, vibrations of, i. 9. 



Elasticity : of ice, ii. 276 ; of the 

 lungs, ii. .121 ; of threads of glass 

 applied to torsion balances, ii. 402. 



Electricity : produced by the mere 

 contact of different conducting bo- 

 dies, i. 27 ; capable of suspending 

 the functions of nerves, i. 34 ; che- 

 mical production and agency of, i. 

 61 ; chemical agencies of, i. 246, 

 278 ; decomposition of the fixed al- 

 kalies by, i. 278 ; on the magnetic 



