IV CONTENTS. 



Want of Dew on Ships traversing the vast soli- 

 tudes of the Ocean, .... 368 



Dew hecomes more abundant as we approach 



the Equator, 369 



Presence of Dew makes known the proximity 



of Masses of Water concealed from the Eye, 370 



Intense Cold during the Night in the Great 



Desert, 370 



Artificial Freezing of Water in Bengal, . 37 1 



XXIX. Obituary, Professor Macgillvray, . . 372 



XXX. Scientific Intelligence : — 



METEOROLOGY. 



1. Meteorological Society at the Mauritius. 2. 

 Great Fall of Rain in India. 3. Annual 

 Amount of Rain at Alexandria, . 372,373 



GEOLOGY. 



4. Examination of Rocks by means of the Mi- 

 croscope. 5. On the Relative Conducting 

 Power of Rocks for Heat. 6. Tertiary Coal 

 in India. 7. Examination of Soils by the 

 Microscope. 8. Rock Salt of the Punjaub in 

 India. 9. Mountain Systems of Europe. 

 10. Survey of the suppositious Submarine 

 Bridge of the Norwegians. 11. On the 

 Pterodactyles of the Chalk Formation. 12. 

 On the Remains of a Gigantic Bird from the 

 London Clay of Sheppey. By J. S. Bower- 

 bank, F.R.S. 13. Map of Switzerland. 14. 

 Salt Lake of Utah. 15. Suggestion that all 

 Africa has a grand Basin-like arrange- 

 ment, 373-376 



ZOOLOGY. 



16. Agassiz appointed Professor of Comparative 

 Anatomy in the Medical College of the State 

 of South Carolina, .... 377 



MISCELLANEOUS. 



17. Galvani and Volta. 18. Sir Charles 



Ly ell's Visit to North America, . 378 



Books and Maps Published and to be Published, 379 



XXXI. List of Patents granted for Scotland from 22d 



June to 22d September 1852, . . 381 



TO CORRESPONDENTS. 

 Mr LTenwood's communication we are affraid will require to be illustrated by 

 expensive plates. Mr Smith's interesting communication is somewhat in the 

 same predicament. Other communications unsuitable for the Philosophical 

 Journal will be returned to the authors. 



ERRATA. 



I'm go 46, foot-note, 1st line, for sine read eine, and same line, for 



gesamten read gesaniinton, 2d line, for Ertes read Erstes. 

 Page 368, for in pari canu, read in similar circumstances. 



