September, 1908 f^Fl Y . 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



VOLUME XXIV., SECTION A 



MATHEMATICAL, ASTEONOMICAL, & PHYSICAL 



SCIENCE 



PART 3 



DUBLIN 



PUBLISHED AT THE ACADEMY HOUSE, 19, DAWSO^' STREET 



SOLD ALSO 



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



By WILLIAMS & NORGATE 



London : 1-1, Henkietta-strkbt, Covent Gauijen 



Edinbuugh : 20, South Fkedeiuck-st. Oxfokd : 7, Broad-st. 



1903 

 Price — Threejience 



