TRANSACTIONS 
OF THE 
[mo Y AL. SOC ERT Y 
or 
EDINBURGH. 
“VOL. XX. 

EDINBURGH: 
PUBLISHED BY ROBERT GRANT & SON, 82 PRINCES STREET. 
AND WILLIAMS & NORGATE, 14 HENRIETTA STREET, COVENT GARDEN, LONDON. 

MDCCCLII. 
