4S0 
INDEX. 
Black-lead mines, account of, ISO. 
Botany, progress of, in Bengal, 376. 
Brazil, notice of scientific travellers in, 218. 337. — Swainson's travels 
in, S69. 
Breguet's chronometer for reckoning minute parts of a second, 32Sv 
Brewster, Dr, on a new optical property of apophyllite, 1. — on the 
structure and refractive power of the coats and humours of the 
human eye, 42. — on a singular optical property of tabasheer, 147. 
— on a remarkable affection of the retina, 2S5.-— on the phos- 
phorescence of minerals, 383. — on the pyro-electricity of Nadel- 
stein, 20.5. 
e 
Calorimotor, Dr Hare's, 414. 
Colton Hill, geognostical description of, 359* 
Gape of Good Hope, geognosy of, 283. 
Caraccas, destruction of, by an earthquake, 272. 
Carmichael, Captain, on a singular fact respecting the Cape swallow- 
421. 
Catalogue of thirty-six principal fixed stars, 321. 
Chromate of Lead, primitive form of, 420. 
Chronometer, new, for reckoning fractional parts of a second, 323. 
Cinnabar, primitive form of, 420. 
Circle, repeating, I99. 
Coal-fields, account of, 409. 
Coal-mines of Great Britain, temperature of air and water in, 134.. 
Colby, Captain, on a singular instance of refraction, 411. 
Comet of 1818, first, 199- — second, ib. — third, 200. — account of are- 
markable one, which has returned 5 times, 390.— of 18 19, first, 
401. — second, 410. 
Compounds, examination of some, which depend on very weak affi« 
nities, 63. 
Congo, whirlpools of the river, 21 6. 
Conifer oe, physical distribution of, 315. 
Copper, blue, of Chessy, 41 9. 
Cornelius, Mr, on an insect which destroys horses, 381. 
Cow, singular fact respecting the, 407. 
Crystallography, new systems of, 211. 
Cuticle, structure of, 213 colour of, ib. 
D 
Head Sea, analysis of the water of, 417* 
Heaf and Blind, notice concerning a boy born, I7I. 
Helphine, a new vegetable alkali, 418. 
Hendera, temple at, 36. 
Hetonating 7md, account of, 423. 
Diamond mine at Panna, 49. 
Double refraction of light, history of, 289. 
Dufresne s collection of natural history, 421. 
Dwfowg and Betirs experiments on heat, 210.— on specific heat, 405. 
-Dust meteoric, showers of, 233. 
