TRANSACTIONS 



OF THE 



ROYAL SOCIETY 



OF 



EDINBURGH. 



VOL. XXIII. 



EDINBURGH: 



PUBLISHED BY EGBERT GRANT & SON, 82 PRINCES STREET, 

 AND WILLIAMS & NORGATE, 14 HENEIETTA STEEET, COVENT G-ARDBN, LONDON. 



MDCCCLXIV. 



