INDEX. 
Ceres , observations on a star so called, - - 21, 
Ceylanite , remarks on, - 
Chatoyance , remarks on that property, - 
Chen evix, Richard, Esq. Observations and Experiments upon 
oxygenized and hyperoxygenized muriatic acid,* and upon some 
combinations of the muriatic acid in its three states 
— — — Analysis of corundum, and of some 
of the substances which accompany it ; with observations on the 
affinities which the earths have been supposed to have for each 
other, in the humid way, - 
Chromate of Iron , Siberian , remarks on, - 
Chrysolite , oriental , remarks on, - - - - 
Colours, on the theory of light and colours, - 
on those of striated surfaces, - 
— — on those of thin plates, - 
on those of thick plates, - 
on those by inflection, - 
— — account of some cases of their production, 
on their dispersion by refraction, - 
Columbium , account of a metal so called, - - - 
Comets , definition of them, 
observations on them, - 
Conic Sections , on their rectification, 
Corundum stone , description of, and its varieties, the oriental ruby, 
sapphire, &c. - 
. — — on its different appearances, 
distinguished into perfect and imperfect, 
- on its colour, - - - 
- on its transparency, 
- on its hardness, - - 
- on its phosphorescence, 
-on its gravity, - 
— on its crystalline forms, 
— on its fracture and texture, 
— phenomena with respect to light, 
- character afforded by analysis, 
~ on the kind called compact, 
— on the matrix of imperfect corundum from India, 
— on the substances which accompany the imperfect 
corundum from India, - - " 
____________ on the matrix of imperfect corundum from China, 
on the matrix of imperfect corundum from Ava, 
on the matrix of perfect corundum from Ceylon, 
page 
> 
318 
271 
126 
327 
50 
244 
12 
35 
37 
41 
42 
387 
393 
65 
225 
22 6 
448 
233 
240 
241 
242 
244 
247 
248 
249 
250 
264 
271 
2 75 
281 
282 
285 
3°i 
3°4 
3°4 
