392 Index. 



Physical Geography, comparative, observations on, by M. Guyot, 



350, 

 Plants of the Silurian system, 122. — Of the Anthracite formation, 



124. — Fossil land plants, as illustrative of geological climate, 



126. 

 Plate-glass, analysis of, 316. 

 Portland Vase, account of, 383. 

 Prichard, James Cowles, M.D., F.R.S., &c., biographical sketch of, 



205. 



Ramsay, Professor, his Passages in the History of Geology noticed, 

 201. 



Rankine, W. J. M., civil engineer, on an equation between the tem- 

 perature and the maximum elasticity of steam and other vapours, 

 28. — On a Formula for calculating the expansion of liquids by 

 heat, 235. 



Rhinoceros, fossil, of Siberia, and mammoth natives of Siberia, 19-i. 



Rivers, their fall considered, 303. 



Rocks, grooved and striated, in the middle region of Scotland, by 

 Charles Maclaren, F.R.S.E., 161. 



Schleiden, Professor, his Principles of Scientific Botany, translated 



by Dr Lankester, noticed, 200. 

 Shells, land, found beneath the surface of sand-hillocks on the coasts 



of Cornwall, by R. Edmonds Jun., Esq., 263. 

 Silver, native, of Norway, 192. 

 Skeletons of wild animals, how disposed of, 194. 

 Snow-line on the Himalaya, account of, by Lieutenant Strachey. 324. 

 Sutherland, Tour in, by Charles St John, Esq., noticed, 201. 

 Sturgeon, William, on the aurora boi'ealis, 147-225. 



Tea, green, mode of colouring, 381. 



Trees cleft by the direct action of electrical storms, by Ch. Martins, 



114. 

 Trilobites of Bohemia, observations on, by M. Barrande, 374. 



Water, the colour of, explained, by Professor Bunsen 

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