January f 190k 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



VOLUME XXIV., SECTION A 



MATEEMATICAL, ASTRONOMICAL, & PHYSICAL 



SCIENCE 



PART 4 



DUBLIN 



PUBLISHED AT THE ACADEMY HOUSE, 19, DAWSON STREET 



SOLD ALSO 



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



By WILLIAMS & ^'OIlGATE 



London : 14, Henrietta-strf.et, Covent Gaiuuen 



Edinburgh: 20, South Fkederick-st. Oxford: 7, Bkoad-st. 



1904 

 Frke Sixpence 



