TRANSACTIONS 



OF THK 



ROYAL SOCIETY 



OF 



EDINBURGH. 



VOL. XXXVI. 



EDINBURGH: 



PUBLISHED BY ROBERT GRANT & SON, 107 PEINCES STREET, 

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



MDCCCXCII. 



