INDEX TO VOL. IV. 



Achromatic telescopes, with fluid ob- 

 ject-glasses, 282— Compared with Re- 

 flectors, 309. 



Adam, Mr M., o» a nautical eye-tube, 

 95. 



Adie, Mr, his sympiesometer recom- 

 mended, 181 — his meteorological regis- 

 ter kept at Canaan Cottage, 192, 384. 



Agardh, Professor, on red snow, 167. 



Amici, Professor, on a property of light 

 in telescopes, 306 — on the comparative 

 performances of refracting and reflect- 

 ing telescopes, 309. 



Anderson, ]\fr George, on the quartz 

 district in the neighbourhood of Inver- 

 ness, 91— on the bituminous rock in 

 Ross-shire, 93. 



Arago, M., on polarised light in Halos, 

 177 — ° n telescopes without irradiation, 

 177 — receives a Copley Medal, 188. 



Arsenic, on its detection in dead bodies, 

 131. 



Astlie, Mr, on condensing wood, 333. 



Ava, on the frontier between it and Ben- 

 gal, 22. 



Bifbbage, Mr, his experiments on the 

 magnetism of rotation, 13, 257- 



Bald, Mr R., on a fine sand at Alloa for 

 flint glass, 333. 



Barlow, Professor, his experiments on the 

 magnetism of rotation, 13, 257— re- 

 ceives the Copley medal, 1 88. 



Barometer, mean height of at the level 

 of the sea, 181. 



Barometer, on the horary variations of 

 the, 290. 



Batracian reptiles, on the eggs of, 380. 



Benzoin, analysis of, 184. 



Berzelius, Prof, on Lithia in minerals,128 



on the orange gas from fluor-spar and 



chromate of lead, 129 — his method of 

 detecting arsenic in persons poisoned, 



131 his researches on Molybda:na, 



133. 



Birds, on those found in the vicinity of 

 Geneva, 269. 



Bengal, on the frontier between it and 

 Ava, 22. 



Boa constrictor, on its eggs, and a brood 

 hatched from them, 221. 



Boat, on a new punt one, 332. 



Botanical geography, observations on, 

 161. 



Boiudcaux, on the great stone bridge of, 

 260. 



Brewster, Dr, on the phosphorescence of 



VOL. IV. NO. II. APRIL 1826 



fluids, 178 — on the optical illusions of 



converting cameos into intaglios, 99— 



on Levyne, 316.— On new rays in the 



spectrum, 337. 

 Brewsterite, analysis of by M. Retzius, 



316. 

 Bridge, account of the great stone one at 



Bourdeaux, 260. 

 Burrampooter and Sanpoo rivers, on the 



Geography of the, 302. 

 Cameos, on their apparent conversion in- 

 to intaglios, &c. 99. 

 Carriage wheels, on securing their axles, 



155. 

 Capocci on the comets of 1825, 876. 

 Cat Le, his optical deception varied, 89. 

 Celestial phenomena, 189, 382. 

 Charcoal highly calcined a conductor of 



heat, 183. 

 Christie, Mr, his experiments on the 



magnetism of rotation, 13, 257. 

 Clark, Dr, his ascent of Mont Blanc, 



255. 

 Clark, Dr Abel, on a gigantic orang 



outang, 193. 

 Cobalt, on the sulphurets of, 136. 

 Cockles, on live ones at a distance from 



the sea, 142. 

 Comets of 1825 described, 175, 376, 377- 

 Colours, on their invisibility to certain 



eyes, 85. 

 Compression of air, on the law of the, 



224. 

 Concretions, on some remarkable ones in 



sandstone, 138. 

 Copley medals adjudged, 188. 

 Crocodiles of Egypt, 380. 

 Cyanogen, on the law of its compression, 



233. 

 Defoliation of trees, observations on the, 



72. 

 De L'isle, Rome, notice of his crystallo- 



graphic labours, 8. 

 Dimorphism of the hydrous sulphates, 



301. 

 Dioptasc, analysis of, 186. 

 Double stars, observations on, 66. 

 Dulong, M. on the refractive power of 



elastic fluids, 211. 

 Duperry, M. on the horary variations of 



the barometer, 294. 

 Earthquake, notice of one felt at sea, 70, 



264, 267— earthquakes in Sicily, of 



1823, described, 165. 

 Elastic fluids, on their refractive power, 



211. 



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