CONTENTS. 



Art. I. The Theory of Successive Development in the Scale 

 of Being, both Animal and Vegetable, from the 

 earliest periods to our own time, as deduced from 



Palaeontological evidence, ... 1 



Silurian Fossils, ...... 5 



Goal- Formation Fossils, ..... 8 



Secondary Fossils, . . . • . 12 



Tertiary Fossils, .,..•• 24 



Geological Age of Man, ..... 26 



Huttonian Theory, . . . . . 31 



II. On the Former Changes of the Alps. By Sir Ro- 

 derick Impey Murchison, F.R.S., . . 31 



III. General and Special Apophthegms. By Robert 



Gordon Latham, M.D., F.R.S., &c., . 39 



IV. On the Connection between the Colour and the Mag- 

 netic Properties of Bodies. By Richard Adie, 

 Esq., Liverpool. Communicated by the Author, 44 



V. A Comparative Examination of the Objective Glasses 

 of Microscopes, from Mr Ross of London, Mr 

 Spencer of America, and M. Nachez of Paris. 

 By J. Lawrence Smith, Esq., . . 48 



VI. On the Currents of the Atlantic, and the Existence 



of the North- West Passage, . . . 61 



VII. Optical Examination of several American MicasK 



By B. SiLLiMAN, Junior, A.M., M.D., &c., 55 



VIII. On Atmospheric Magnetism. By Pro. Faraday, 62 



IX. On some Properties peculiar to Caoutchouc, and 



their Applications. By Mr BkocKEboN, . 67 



