PROCEEDINGS 
Of 
THE ROYAL SOCIETY 
Of 
EDINBURGH. 
VOL. X. 
NOVEMBEK 1878 to JULY 1880. 
Utei/fiRAWfcS. 
EDINBURGH : 
PRINTED BY NEILL AND COMPANY. 
MDCCCLXXX. 
Reprinted with the permission of The Royal Society of Edinburgh 
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