CONTENTS. 



VII. Observations on the Virilescence, Feminescence, and 



Rejuvenescence of Animals. By Dr Mehliss, 272 



1. Virilesence, . . • • 273 



2. Feminescence, . • .277 



3. Rejuvenescence, . • • 279 

 VIII. Description of an Improvement in the Common Vice, 



and Vice-Chuck, whereby the action of the Screw- 

 is made perfect. By Mr Robert Wilson, En- 

 gineer, Paul's Work, Edinburgh. Communicated 

 by the Society for the Encouragement of Useful 

 Arts in Scotland, . . . 280 



IX. On the Lunar Mountains Tycho, Pictet, Saussure ; 

 and on the Geology of the Moon. By William 

 Beer and J. H. Madler of Berlin, . 283 



1. Topography of the Surface of the Moon, 283 



2. Geology of the Moon, . 288 

 X. Geological Instructions, prepared by M. Elie, de 



Beaumont for the French Scientific Expedition to 

 the North of Europe, . . . 292 



1. Hypersthene Rocks, . . . 294 



2. Trap-Rocks, . . . 295 



3. Euphotide and Serpentine Rocks, • 296 



4. Granite of Rapakivi, . . . 296 

 6. Rock Formations of Christiania, &c. . 296 



6. Two great series of Dislocations in Scandinavia, 299 



7. Progressive Rise of the Land above the Level of 



the Sea, .... 300 



8n Gradual sinking of the Land in Scania, 301 



9. Stationary condition of parts of the coast of Norway, 302 



1 0. Beds of recent shells above the present Level of 



Sea, .... 302 



11. Beds of Fossil Infusoria, . . 305 



12. Transition and Secondary Formations, . 305 



13. Geology of Spitzbergen and Bear Island, 307 



14. Scandinavian Diluvium, . . 3 ] 

 16. On the Glaciers of Spitzbergen, . 31 4 

 16. Volcanic Island of Jan May en, . 3] 6 



XI. Remarks upon the Physical Constitution of the Ara- 

 bians, who may be considered as the Prototype or 

 Primitive Race of the Species. By M. Larrey, 318 



