PROCEEDINGS 



OF TIIK 



ROYAL IRISH ACADEMY 



VOLUME XXVIIl 



SECTION B.-BIOl.OGICAL, GEOi.OGLCAL, AND 

 CHEMICAL SCIENCE. 



C&^Xy 



DUBLIN: HODGKS, llOGIS, & CO., Ltd, 



LONDON: WILLIAMS .^ NOllGATE 



1909-1910 



