THE 



TRANSACTIONS 



ROYAL IRISH ACADEMY 



VOLUME XXIII. 



PART I.-SCIENCE. 



DUBLIN: 

 PRINTED BY M. H. GILL, 



ruINTER TO THE ROYAi IRISH ACADEMY. 



SOLI) BV HODGES, SMITH, AND CO., DUBLIN, 



ASV BV T. AND W. HOONE, LONDON. 

 JIDCCCLVI. 



