TRANSACTIONS 



OF THE 



ROYAL SOCIETY 



OK 



EDINBURGH. 



VOL. XXXVIII. 



EDINBURGH: 



PUBLISHED BY ROBERT GRANT & SON, 107 PRINCES STREET. 

 AND WILLIAMS & NORGATE, 14 HENRIETTA STREET, COVENT GARDEN, LONDON, 



MDCCCXCVII. 



