( 441 ) 



INDEX. 



Achromatic eye-pieces of spy-glasses, observations on, by Charle* 

 Goring, M. D., 259. 



Action of machines, observations on, by Edward Sang, Elsq., 70. 



Agate, on the red colour of, 210. 



Analogy between the organized structure and red colour of the 

 globules in the blood of animals, and of those red vegetable 

 globules named Protococcus KermesinuSy 209. 



Animalculi, microscopic, considered as a cause of putrefaction, 208. 



Arabians, their physical constitution, observations on, by Larrey, 

 318. 



Arago on colour of the ocean, 330. 



Aragonite and calcareous spar, their mode of formation, 207. 



Azara, Don Felix, his natural history of the quadrupeds of Para- 

 quay and La Plata noticed, 217. 



Atmosphere, temperature of the lower strata of, 353. 



Atmospherical refraction uncommon at Dover, 423. 



Aurora borealis, observations on, 419. 



Beagle, zoology of the voyage of, 216, 433. 



Bear or Cherry Island, geology of, 309- 



Beer. William, and Miidler, J. H., on the lunar mountains, Tycho, 

 Pictet, Saussure, and on geology of the moon, 283. 



Bequerel, M., on the electric origin of metalliferous veins, 167— 

 on the disengagement of caloric by friction, 377. 



Beryl of Aberdeenshire, 206. 



Blainville, M. de, his observations on the classification and antiquity 

 of the Cheiroptera, 21. 



Botany of Ireland, brief view of, by J, T. Mackay, 374. 



Botanical Society of Edinburgh, proceedings of, 199, 415. 



Boue, Dr A., his geographical and geological observations on some 

 parts of European Turkey, viz. Mcesia, Bulgaria, Romelia, Al- 

 bania, and Bosnia, 174. 



Bromhead, Sir Edward, his attempt to ascertain characters of the 

 botanical alliances, 123. 



Bronn, Dr G. H., his Lsethea Geognostica, noticed, 216. 



Calcareous spar and arragonite, on their formation, 207. 



Caspar, Dr, on the duration of human life, 350. 



Casting establishments, observations on, by C. H. Wilson, 28. 



Clark, Mr, his discovery of fossil organic remains in Sutherland 



quartz-rock, 430. 

 Clay, its lamination by electricity, by R. W. Fox, 196. 

 Crystals in the cells of plants, observations on, 19. 

 Currents, submarine, observations on, 424. 



Dislocations, two series of, in Scandinavia, 299, 



Earth, temperature of, 202. 



