PROCEEDINGS 



OF THE \.JKjrT • ' • 



ROYAL IRISH ACADEMY. 



VOLUME IV.— SCIENCE. 



i,^.T* ■■ 



DUBLIN: 



PUBLISHED BY THE ACADEMY, 

 AT THE ACADEMY HOUSE, 19, DAWSON-STEEET. 



SOLD ALSO BY 



HODGES, FIGGIS, & CO., GEAFTON-ST. 

 And by WILLIAMS & NOEGATE, 



London : 

 14, Henrietta-street, Covent Garden. 



Edinburgh : 

 20, South Frederick- street. 



1884—1888. 



