A ' Apni, 190S Of S cien c fe IE 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



VOLUME XXIV., SECTION A 



MATHEMATICAL, ASTRONOMICAL, & PHYSICAL 



SCIENCE 



PART 2 



DUBLIN 



PUBLISHED AT THE ACADEMY HOUSE, 19, DAWSON STREET 



SOLD ALSO 



By HODGES, FIGGIS, & CO. (Ltd.), GRAFTON-ST. 



By WILLIAMS & NORGATE 



London: 14, Henrietta-street, Covent Gaiiden 



EDiNBTiuaH : 20, South Frederick-st. Oxford : 7, Broad-st. 



1903 

 Price — Th reepence 



