PROOEEDIMS 



OF THE 



ROYAL IRISH ACADEMY. 



VOIiUIVIE: XXIV.— SECTION A. 



Part 1. 



MATHEMATIGAL, ASTRONOMICAL, AND PHYSICAL SCIENCE. 



DUBLIN: 



PUBLISHED AT THE ACADEMY HOUSE, 19, DAWSON STREET. 



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



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1902. 



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