Index. 459 



Lemming's, on the migrations of, by M. Martins, 448. 



Limestone, on the agency of animalcules in the formation of, by 

 Dr Buckland, 441. 



Long's American frame-bridge, notice relative to, by David Ste- 

 venson, civil-engineer, 297. 



Lyell, Charles, Esq., on the geological evidence of the former ex- 

 istence of glaciers in Forfarshire, 199. 



Macpherson, Murdoch, Esq., register of the temperature of the at- 

 mosphere kept at Fort Simpson, North America, in the years 

 1837-8-9 and 1840, 124. 



Marx, Professor K. F. H., his memoir of the life and writings of 

 the late Professor Blumenbach, 221. 



Martens, Dr C, his observations on the glaciers of Spitzbergen, 

 compared with those of Switzerland and Norway, 160, 2S4. 



Martins, M., on the migrations and manners of lemmings, 448. 



Meikle, H. Esq., on the electricity and explosive force of steam, 

 and on the economy of the hot-blast furnace, 55. 



Meteorological Tables, Mr Adie's, 421 Lord Grey's, 422. — Sir 



D. Milne's, 423 Dr Dunbar's, 424 Mr Atkinson's, 426. 



Milne, Sir David, his meteorological table, 423. 



Mineral substances, uncrystallized, on the forms of, by M. Ehren- 

 berg, 353. 



Mohs, Sir Frederick, his summary of the most important geognos- 

 tical phenomena, with which it is necessary to be acquainted 

 in preliminary mining operations, 26. 



New Publications, noticed, 452. 



Orkney, fossil fishes of, noticed by Dr Traill, 215. 



Patents, list of, 217, 452. 



Pyrope, Dr Apjohn on the composition of, 445. 



Railways, notice of a new signal light for, by Alan Stevenson, 



LL.B., 347. 

 Richardson, John, M.D.,on the frozen soil of North America, 1 10. 

 on the cultivation of the cerealea in the high latitudes of 



North America, 123. 

 . — his observations on solar radiation, made at Fort Frank- 



lin, in the years 1825, 1826, and 1827, 240. 



appendix to his observations on solar radiation, 419. 



Robison, Sir John, his notice regarding a cheap camera lucida, 

 402. 



