INDEX. 
A 
Acetate of Copper, its optical structure, 3. — chemical composition, 4. 
Achafalaya River, account of the drift-wood accumulated in the, 402= 
Aerial shadows seen on the summit of Benlomond, 218. 
Africa, account of Mr Campbell’s journey in, 403.— on the climate 
of the south of, 279- 
Allamand, M. on electrical phenomena observed in Switzerland, 391. 
Alps, on the structure of the, 224. 
Antelope, 269 . 
Aphaca, 368. 
Apophylliie, on the optical properties of, 213, 334.— of Faroe and 
Uton, analysed by M. Berzelius, 3. 
Apparatus, account of an improved one for restoring the action of 
the lungs, 53.— electro-magnetic of Colonel Offerhaus, 352. 
Arctic Regions, rewards offered for discoveries in the, 403. 
Arragonite, on the optical structure of, 2. — on different kinds of, 211. 
Arsenic acid, 350. 
Arts, school of, in Edinburgh, 234. 
Asclepiadeoe, Mr Brown’s Essay on the, translated, 230. 
Astronomical observations made on the Continent, 71* 
Atlantic Ocean, on the temperature of the, 283. 
Atush Kudda, or fire-temples of the Guebres, described, 21. 
Aurorae boreales seen in the Arctic Regions, 202. 
Ava, account of a map of the country south from, 75. 
B 
Badku, naphtha springs at, 22. 
Barlow, Mr, on the effect of magnetism on chronometers, 220, 383. 
—his essay on magnetic attractions analysed, 26l. 
Bats in Congo, 274. 
Bee, account of the singular treatment of a queen, 65. 
Benlomond, on aerial shadows seen on its summit, 218. 
Berzelius, M. on the composition of the apophyllites, 3.- — on nitrate 
of strontian, 4.— on sulphate of potash and iron, 5. 
Birds, list of those found in the district of Harris, 257. 
Block-tin pipes, on the substitution of, in place of leaden ones, 120. 
Boa constrictor, 274. 
Bockman on the intensity of magnetism produced by electricity, 392. 
Boracite, on a new primitive form detected in, 217- 
Brewster, Dr, on the connexion between the optical structure and 
the composition of minerals, 1. — on the optical structure of ar- 
ragonite, 2. — on the murio- sulphate of magnesia and iron, 3.- — » 
on the apophyllites, ib. — on acetate of copper, 4.— on nitrate of 
strontian, ib. — on sulphate of potash, 5.- — on talc and mica, ib.— 
on sulphate of nickel, 6, 208. — on nitrate of lead, 7*-— on the me- 
sotypes, ib.* — on the poles of maximum cold, 199 *“~on the opti- 
cal properties of euclase, 217’ — on a new primitive form in bo- 
racite, ib. — on the distribution of the colouring matter in topaz, 
ib. — on the structure of leucite, 218. — notice of his new system 
of mineralogy, 230. 
Bridges of suspension, history of, 237-— account of the one over the 
Tees, 238. — in America, 239. — one proposed at Runcorn, 240. 
NO. X. VOL. V. OCTOBER 1821. E C 
