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11 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



Volume XXVII, Section A, No. 11 



WILLIAM M'FADDEN ORR 



EXTENSIONS OF FOURIER'S AND THE 

 BESSEL-FOURIER THEOREMS 



DUBLIN 



HODGES, FIGGIS, & CO., Ltd. 



LONDON : WILLIAMS & NORGATE 



1909 



Price One Shillmg and Sixpence 



