PROCEEDINGS 
2 , 
OF 
THE ROYAL SOCIETY 
OF 
EDINBURGH. 
VOL. X. 
NOVEMBER 1878 to JULY 1880 . 
w % 
EDINBURGH 
PRINTED BY NEILL AND COMPANY. 
«2 7 
' s '**Timi !iwU V ' 
MDCCCLXXX. 
