TRANSACTIONS 



OF THE 



ROYAL SOCIETY OF EDINBURGH. 



Vol. IX. 



■jr'<//r ~_E,/'n 



EDINBURGH: 



PRINTED FOR WILLIAM & CHARLES TAIT, PRINCE^ STREET, 



AND LONGMAN, HURST, REES, ORME, & BROWN, 

 LONDON. 



1823. 



