CONTENTS. lU 



PAGE 



XIV. Thirteenth Letter on Glaciers ; addressed to Pro- 

 fessor Jameson. By Professor J. D. Forbes. 



Acceleration of the Surface Motion confirmed — New De- 

 termination of the Velocity of different Glaciers- 

 Discovery of a Knapsack buried ten years in the Ice — 

 Manner of Conversion of the Neve into Ice — Manner 

 of Ejection of Stones from Glaciers, . .136 



XV. On Polished and Striated Rocks, lately discovered on 

 Arthur Seat, and other places near Edinburgh. 

 By David Milne, Esq., one of the Secretaries of 

 the Royal Society of Edinburgh. Communicated 

 by the Author, . . . . 154 



XVI. On producing White or Neutral Light, by means of 

 ordinary Artificial Light. By George Tait, 

 Esq., Advocate, Vice-President of the Royal 

 Scottish Society of Arts. Communicated by the 

 Royal Scottish Society of Arts, . .172 



XVII. Remarks on the Geological Relations of the Gneiss of 

 the Alps. By Professor B. Studer of Berne. 

 (From a Private Letter addressed to Professor 

 J. D. Forbes,) . . . .186 



XVIII. On an Economical Mode of using the Potato. By 

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

 in a Letter addressed to Professor Jameson, . 187 



XIX. Proceedings of the Wernerian Natural History So- 

 ciety, • . . . .190 



XX. List of Patents granted for Scotland from 24th Sep- 

 tember to 21st December 1846, . 193 



%* Owing to the great irregularity in the arrival of the Posts, Scientific In- 

 telligence, Notices of New Books, &c., are delayed until publication of next 

 Number of Journal. 



