Page:Proceedings of the Royal Irish Academy vol XXXIII.djvu/9

 u: UU;l, PROCEEDINGS OF THE ROYAL IRISH ACADEMY YOLUME XXXIII SECTION A.-MATHEMATICAL, ASTRONOMICAL, AND PHYSICAL SCIENCE. ^oty:Lr)A T DUBLIN: HODGES, FIGGIS, & CO., LTD. LONDON: WILLIAMS & NORGATE 1916-1917