iv 
CONTENTS. 
IV. GENERAL SCIENCE. 
17* Account of the Rattlesnake. 18. Drift-Wood accumulated 
in the Achafalaya. 19- Rewards for Discoveries in the Arc- 
tic Regions. 20. Mr Campbell’s second Journey in Africa. 
21. Eruption of Carbonised Wood at New Madrid. 22 . 
Effects of Cold upon Ice. 23 . New Volcano near Leiria 
in Portugal. 24 . Eruption of a Spring near Ripon. 25 . 
Tree which produces the Caoutchouc, or Elastic Gum. 
26. Account of the Leech of Ceylon. 27. Removal of a 
Paralytic Affection by Lightning. 28. Altitude of Dhwa- 
lagiri and other Mountains of the Himalaya. 29- Third 
Report of the Commissioners of Weights and Measures. 
SO. Plant which Dissolves in Water. SI. Impediments 
of Speech, - 401-411 
Art. XXV. List of Patents granted in Scotland since 1st 
June 1821, - - 411 
List or Plates, - * - 412 
INDEX, - - 41S 
