REPORT 



OP THE 



FORTY- NINTH MEETING 



OF THE 



BRITISH ASSOCIATION 



FOR THE 



ADVANCEMENT OF SCIENCE; 



HELD AT 



SHEFFIELD IN AUGUST 1879. 



LONDON : 

 JOHN MUKEAY, ALBEMARLE STEEET. 



1879. 



Office of the Association : 22 Albemarle Street, London, W. 



