CONTENTS. 



PAGE 



Art. I. An Attempt to classify the Phenomena in the Glens 

 of Lochaber with those of the Diluvium, or Drift, 

 which covers the face of the Country. By Sir G. 

 S. Mackenzie, Bart,, ;F.R.S., V.P.E.S.E., &c. 

 With a Map. Communicated by the Author, 1 



II. On the Comparative Physical Geography of the 

 Arabian Frontier of Egypt, at the earliest Epoch 

 of Egyptian history, and at the present time. By 

 Miss Fanny Corbaux. With Two Plates. Com- 

 municated by the Authoress, . . .13 



III. On the Specific Gravity of the Water of the Sea off 

 the Coast of British Guiana. By John Davy, 

 M.D., F.R.S., Lond. & Ed., Inspector-General of 

 Army Hospitals, &c. Communicated in a Letter 

 addressed to Professor Jameson, ... 43 



IV. On the Urinary Secretion of certain Animals, consi- 

 dered in connection with their Temperature, Food, 

 &c. By John Davy, M.D., F.R.S., Lond. & 

 Ed., &c 46 



