CONTENTS. "I 



PAGE 



Art. XIV. On the Physical Geography of the Alps, . 28? 



I. Glaciers, 288 



II. Geology of the Alps.— 1 Origin of Valleys, . 288 



2. Origin and Formation of Springs, . 292 



3. On the Erosion and Weathering of the 



Surface of the Earth, . . . 294 



III. Meteorology of the Alps, . . . 296 



IV. Botanical Geography of the Alps, . . 299 



XV. Upon the Identity of the Marks of Glacial Action 

 on the Rocks in the Environs of Edinburgh, with 

 those observed by the Author on the Continent of 

 Europe and in Spitzbergen. By Charles Mar- 

 tins, M.D., Secretary of the Geological Society 

 of France, &c., &c. Communicated by the 

 Author, 301 



Examination of the Theory of Floating Icebergs, . 303 

 Proofs of the existence of Ancient Marine Glaciers in 



the Environs of Edinburgh, . . . 311 



Zoological Proofs of the Ancient Existence of Marine 



Glaciers in Scotland, . . . . 315 



The most Common Arctic Shells of the Laminated Clay, 316 



XVT. On the Emery of Commerce, . . . 318 



XVII. On the General Vibration or Descent and Up- 

 heaval which seems, at a recent Geological period, 

 to have occurred all over the Northern Hemi- 

 sphere. By Dr Buist, of Bombay. Communi- 

 cated by the Author, .... 322 



XVIII. Synopsis of the Hunterian Lectures on Comparative 

 Osteology. By Richard Owen, F.R.S., Hun- 

 terian Professor to the College, . . . 329 



XIX. On Recent Researches into the Natural History 

 of the British Seas. By Professor Edward 

 Forbes. Communicated by the Author, . 335 



XX. Optical Examination of several American Micas. 

 By B. SiLLiMAN, Junior, A.M., M.D., &c. Copy 

 communicated by the Author, . . . 339 



