VL r 



/iCA 



PROCEEDINGS 



d~o(i(^^l,^)c^ 



OF THE 



c/f 



ROYAL IRISH ACADEMY 



VOLUME XXIX 



SECTION A— MATHEMATICAL, ASTRONOMICAL, AND 

 PHYSICAL SCIENCE. 



'■^'X'at*- 



BlUBLIN': HODGES, FIGGIS, & CO., LTD. 



LONDON: WILLIAMS & NORGATE 

 1911-1912 



