PROCEEDINGS 



OF THE 



ROYAL SOCIETY OF LONDON. 



From November 18, 1880, to March 17, 1881, 



VOL. XXXI. 



OCT 18 1881 



LONDON : 



HARRISON AND SONS, ST MARTIN'S LANE,, 

 printers in (ftrbinarg to Witt IJtajtstg. 

 MDCCCLXXXI. 



