378 Index. 
Castelnau, M. F. de, account of his mission to the Pampa del Sacra- 
mento, 119. 
Chalk-formation, the limits of its distribution, by M. de Buch, 140. 
Chambers, R., Esq., F.R.S.E., his personal observations on terraces, 
and other proofs of changes on the relative level of sea and land 
in Scandinavia, 66—On the geology of the Baltic, 350— 
Letter to him from M. Morlot, on the level of the molasse in 
the Eastern Alps, 134. 
Changes of the relative level of sea and land in Scandinavia, 68. 
Christison, Professor, on the gamboge tree of Siam, 364. 
Comets, observations on, by W. J. M. Rankine, Esq., C.E., 92. 
Currents, theory of, by M. Babinet, 160. 
Davy, Dr John, on the action of lime on animal and vegetable sub- 
stances, 34. 
Dawson, J. W., account of a halo observed at Pictou, Nova Scotia, 65. 
Dead Sea, its waters chemically examined by Messrs Thornton and 
Herapath, 313—its infusoria by Ehrenberg, 183. 
Diamond, on its derivation from anthracite and avaphite, by Dr 
Wilson, 337—Diamonds found in California, 185. 
Favre, Professor, his account of the valley of Reposoir, in Savoy, 113. 
Fixed stars, their absolute size, considered by Professor Piazzi 
Smyth, 297. 
Flora of the Date Country and Sahara, 187. 
Floras, fossil, which have succeeded each other on the earth’s surface, 
according to the views of M. Brongniart, 320. 
Fluoride of calcium, its existence in the waters of the Baltic, by Dr 
Wilson, 345. 
Flysch, its geological signification, by M. Studer, 146. 
Forbes, Prof. J. D., on the geology of the Alban Hills, at Rome, 360. 
Prof, Edward, his views on the geographical distribution of 
British plants, by M. A. dArchiac, 23. 
Forchammer, Professor, abstract of his paper on the rarer substances 
which occur in sea-water, 348. 
Fossil vegetables, the different states in which they occur, 99. 
Galbraith, William, A.M., on the tides and dew-point, 7—On tides, 
, 239. 
Gamboge tree of Siam described, 364. 
