377 
TN ty BX, 
African man-like ape of gigantic size described, 273. 
Agates, their porosity and colouring considered, by M. Noggerath, 
166. 
Agriculture and Chemistry, or bearing of Chemistry on Agriculture, 
by Professor Low, 286. 
Airdrie coal-field described, 173. 
Alban Hills, Geology of, 360. 
American agriculture noticed, 367. 
Anthracite or glance-coal of the Calton Hill, in Edinburgh, analysed 
by Dr Voelcker, 333. 
Arkansite, a new variety of Brookite, described, 184. : 
Arkose, conjectured to be a metamorphic rock, — | 
Australia, climate of, 358. 
Babinet, M., his theory of marine currents, 160. 
Baierine, a variety of columbite, 184. 
Bald, Robert, Civil Engineer, his description of the Airdrie coal-field, 
173. 
Baltic, remarks on its geology, 350. 
Basalt from the Rhine, an analysis of, by M. Ebelmen, 186. 
Beaumont, Elie de, on volcanic and metalliferous eruptions, 94, 
Black oxide of copper of Lake Superior, account of, 183. 
Boutigny (d’Evreux), on the spheroidal state of bodies ; man in- 
combustible, 104. 
Brewster, Sir David, his notice of a chromatic stereoscope, 150— 
his observations on the formation of the diamond, 340. 
Bryson, Alexander, Esq., his description of new optical instruments, 
19. 
Buch, M. de, on the chalk-formation, 140. 
Burying alive, observations on, 188. 
California, its gold region deseribed, by the Rev. G. 8. Lyman, 151. 
Californian gold, analysis of, by Dr Hofman, 185. 
Caldecott, the astronomer, biographical sketch of, 249, 
VOL, XLVUI. NO. XCVI.—APRIL 1850, 2B 
