September, 190Jf I5 2 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



VOLUME XXV., SECTION A 



MATHEMATICAL, ASTRONOMICAL, AND PHYSICAL 



SCIENCE 



NUMBERS 1, 2 



DUBLIN 



PUBLISHED AT THE ACADEMY HOUSE, 19, DAWSON STREET 



SOLD ALSO 



By HODGES, FIGGIS, & CO. (Ltd.), GRAFTON STREET 

 And ky WILLIAMS & NORGATE 

 London, Edinkurgh, and Oxford. 



1904 



Price One Shining/ 



