4-20 



Copper ; arseniate of, from Cornwall, 

 i. 43 ; analysis of, i. 45 ; on the dif- 

 ferent kinds of sulplmret of, i. 137 ; 

 on the changes in some ancient al- 

 loys of, ii. 258 ; on the magnetism 

 of, during rotation, ii. 251. 



Copper-ore, new species of, i. 479 ; 

 red octaedral, of Cornwall, analysis 

 of, i. 46. 



Copper-sheeting, on the corrosion of 

 by sea-water, and methods of pre- 

 venting, ii. 207, 213, 242, 284. 



Corn tainted with must, process of pu- 

 rifying, ii. 57. 



Cornwall : on the arseniates of copper 

 and of iron from, i. 43, 45 ; account 

 of the Relistian tin mine in, i. 275 ; 

 progressive improvements made in 

 the steam-engines in, ii. 393 ; elec- 

 tro-magnetic properties of metallife- 

 rous veins in the mines of, ii. 412. 



Corpora lutea, on, ii. 106. 



Correction for variations of temperature 

 in the invariable pendulum, ii. 404. 



Corrosive sublimate, on, ii. 173. 



Corundum stone, description of the, i. 

 82 ; analysis of, i. 87. 



Cote's theorem, a remarkable appli- 

 cation of, i. 442. 



Crocodilus, the genus, on the structure 

 and use of the submaxillary odorife- 

 rous gland in, ii. 309. 



Cretinism, account of, i. 292. 



Croonian Lectures; by E. Home: 

 on the membrana tympani of the ear, 

 i. 1 ; on the irritability of nerves, i. 

 33 ; on the power of the eye to ad- 

 just itself to different distances, when 

 deprived of the crystalline lens, i. 

 62 ; on the changes the blood un- 

 dergoes in the act of coagulation, ii. 

 90, 91 ; on the component parts of 

 the blood, ii. 1 18 ; on the conversion 

 of pus into new flesh, ii. 103; micro- 

 scopical observations, on the brain 

 and nerves, on the discovery of valves 

 in the branches of the vas breve, 

 and on the structure of the spleen, 

 ii. 137 ; on the anatomical structure 

 of the eye, ii. 159 ; on the internal 

 structure of the human brain, ii. 203 ; 

 on the existence of nerves in the pla- 

 centa, ii. 226; on the mode of pro- 

 pagation of the oyster and the fresh- 

 water muscle, ii. 301. 



; by Mr. A.Carlisle: 



on muscular motion, i. 1 63 ; on the 

 arrangement and mechanical action 

 of the muscles of fishes, i. 210. 



Croonian Lecture ; by Dr. Young : 

 on the functions of the heart and 

 arteries, i. 314. 



; byDr.Wollaston: 



on the duration of muscular action, 

 origin of sea-sickness, and advan- 

 tages derived from riding, i. 3 18. 

 ; by Mr. B. C. Bro- 



die : on the influence of the brain 

 on the action of the heart, and on the 

 generation of animal heat, i. 388. 

 -; by Mr. F. Bauer :- 



microscopical observations on the 

 Vibrio tritici, ii. 179. 



Cryophorus, Dr. Wollaston's descrip- 

 tion of, i. 448. 



Crystallization, which forms two oppo- 

 sitely polarized images, and exhibits 

 the complementary colours by po- 

 larized light, on the effects of pres- 

 sure in producing, ii. 7. 



Crystallized bodies : on the affections 

 of light transmitted through, i. 490; 

 on the laws of polarization and dou- 

 ble refraction in, ii. 92; action of 

 crystallized surfaces on light, ii. 1 1 1 ; 

 on the action of on light, ii. 122. 



Crystallography, a difficulty in, ex- 

 plained, i. 446. 



Crystals : Iceland, oblique refraction 

 of, i. 92 ; on the elementary parti- 

 cles of, i. 446 ; doubly-refracting, 

 on the communication of the struc- 

 ture of to glass, &c. ii. 39 ; on the 

 laws which regulate the absorption 

 of polarized light by, ii. 104 ; on 

 the aeriform and liquid matter con- 

 tained in, ii. 174; general method 

 of calculating the angles made by 

 any planes of, ii. 227. 



Cuprane and Cupranea, i. 425. 



Cystic oxide, i. 376. 



D. 



Dalton (J.) on the constitution of the 

 atmosphere, ii. 267 ; on the height 

 of the aurora borealis, ii. 342 ; ob- 

 jections to Mr. Dalton's estimate, ii. 

 361. 



Daniell (J. F.) on a new register-py- 

 rometer, ii. 404. 



Daubeny (Dr. C.) on the occurrence of 



