422 INDEX. 
Cavendish, Mr, on the principle of artificial desiccation and congelati<» 
by the air-pump, 56. 
Cavern of Guacharo, account of the, 83. 
Chemical Discoveries^ history of, 299- 
Chemical Analyses, 313. 
Christie, Mr, on the influence of masses of iron on magnetic needles, 
188. 
Chrome, the characteristic ingredient of meteoric stones, 406. 
Clarice, Dr £. D., on the purple precipitate of Cassius, 188. 
Cloth, on its spontaneous combustion, 199* 
Coates's hydrostatical balance, 48. 
Combustion of different oils, on the, 303. 
Comet of 1819 j account of, 399' 
Comharsein, account of the pass of, 219- 
Compass, mariners, account of its early invention, 124. Note. 
Compressibility of water, I96. 
Congelation, artificial, Nairne’s methods of, 56. 
limit of perpetual, on the Himalaya range, 225. 
Congo, on the identity of it with the Niger, 102. 
Coosima, volcano of, account of, 349. 
Copperplate Printing, on a remarkable kind of, 418. 
Crucibles, on a new method of forming them, 81. 
Crystals, on the absorption of light by, 243. 
Crystallography, account of Professor Mohs* System of, 156, 217* 
D 
Dana, Dr, on cantharidin in the Lytta vittata, 315. 
Daubeny. Dr, on the volcanoes of Auvergne, 359? 
Daubuissons formula for mean temperatures, 11. Note. 
Davis, Rev. G. on halos and mock suns observed in Cornwall, 187» 
Delphine, a new vegetable alkali, account of, 305. — sulphate of, 306.— = 
nitrate of, 306. — acetate of, 306. — oxalate of, SO6. 
Densities of different oils at different temperatures, 303, 
Desiccation, artificial method of, 56. 
Dewar, Dr, on the hair, &c. of animals, 183. 
Diagonal eye-piece, account of a new one, 75. 
Diamond, on a singular structure in the, 99* 
Diamond Mines of Mallivully, account of the strata at the, 72f 
Dichroism, on the phenomena of, 243. 
Dickroife, remarkable properties of, 246. 
Dich, Mr, on Venus seen near the sun, I9I. 
Dickson, Mr, on a new water-pressure engine, 176, 
Diemens Land, population of, 417. 
Double Stars, observations on, 171- 
Double Refraction, account of Pluygens’ theory of, 148. 
Dunbar, Rev. Mr W, on the instinct and operation of bees, 143, 
E 
partk, on the magnetism of the, 125. 
— , on the figure, 288. 
Earthquake Kutch, account of, 120. 
ip Java, 198. 
