CHR 
Cholera, Mackintosh on, xxxiv, 49. 
, miscellaneous notices respec- 
ting, xxv, 174. 
Cholesterine, action of potash on, 
J. L. Smith, xliv, 60. 
AY 
Chondrodite, account of, v, 203,| 
(called yellow mineral) ; v, 245. 
, crystal of, J. D. Dana, xlvi, 
381.f 
in New York, v, 30; viii, 
92; ix, 244; xix, 223; xxi, 325.f 
in New Jersey, v, 30, 245; 
vi, 200. 
in Pennsylvania, vill, 289 ; 
xiv, 17. 
Christianite (anorthite), xi, 261. 
Chromate of potash, to test the pu- 
rity of, S. Zuber, xxiv, 872. 
, (bichromate,) manufac- 
ture of, at Glasgow, xli, 50. 
Chromatype, R. Hunt, xlvi, 396. 
Chromic iron of Maryland, analysis 
of, H. Seybert, iv, 321. 
from Cuba, analysis of, 
J. C. Booth, xxxviii, 248. 
, remarks on, xxvii, 18, 
20. 
in Massachusetts, ii, 
in Delaware, iv, 53. 
in Maryland, xxiv, 349, 
355f; xxvii, 18, 20. 
Chromium, Vauquelin’s process for, 
obtaining, xxi, 375. 
—, on the combinations of, A. A. 
Hayes, xiv, 136. 
oxide, crystals of, xxviil, 396. 
, sulphate of oxide, M.E. Kopp, 
xviii, 189. 
Chronometers, remarks on, xxix, 
297. 
——, Deni’s improvements, xliv, 
161. 
, errors of, EL. J. Dent, xlv, 
83.f 
, sea and land rates of, Parkin- 
son and Frodsham, xxvi, 121. 
, rate varied by the density of 
the medium containing, x, 185. 
, purification of olive oil for, 
xx, 166. 
CLA 
Chronometers, new compensation- 
balance for, H. J. Dent, xlv, 83.f 
| , glass balance for, xxxii, 330.f 
Chrysoberyl of Haddam, analysis 
of, H. Seybert, viii, 105. 
in Connecticut, ii, 142, 240; 
iv, 52. 
in New York, iv, 37. 
Chrysoprase, vill, 234; xvil, 353. 
‘Churchill, S., notice of a double 
fish, xxvi, 116.f 
Chyometer, mode of determin- 
ing specific gravities with, xi, 
126.f 
Cicada septendecim, or seventeen 
year locust, habits of, xilil, 224. 
, account of, S. P. Hil- 
dreth, xviii, 47.f 
, remarks on,D. Thomas, 
xxi, 188. 
Cinchona, on the different kinds of 
bark confounded with, De Can- 
dolle, xvii, 388. 
bark, experiments on, G. W. 
Carpenter, ix, 363. 
'‘Cinchovatine, xlvii, 196. 
Cinnabar in Michigan, i, 4383; ii, 
170; xxxvii, 185. 
Cinnamon stone of Ceylon, analy- 
sis of, xiv, 204. 
Cipher, new diplomatic, iv, 377. 
Circulation of the blood, regulation 
Of See Acken | xXxvill aioe 
in plants, xix, 393. 
E. Emmons, 
__—— 
99. 
Cist, Z., mines of anthracite about 
Wilkesbarre, Pa., iv, 1. 
Cist, J., on the Melolontha or May 
bug, vili, 269.f 
Cisterns for water, mode of con- 
structing, xxv, 301. 
Citric acid from gooseberries, xvi, 
385. 
4 XXVI, 
|Citricic acid, S. Baup, xxxiv, 206. 
Civilization, connection of, with 
mental aberration, xxii, 379. 
Clam, eatable, of N. Y., facts re- 
garding, x, 287. 
Clark, D. A., singular appearances 
of snow and hail, ii, 182. 
