[Oocropsr, 1878. | 
THE 
SCIENTIFIC TRANSACTIONS 
OF THE 
ROYAL DUBLIN SOCIETY. 
VOLUME I. (NEW SERIKS). 
V.—On the Mechanical Theory of Crookes’s Force. By Gxorau Francis FIrzg@HRALp, 
M.A., F.T.C.D. [Read March 18th, 1878. ] 
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Jo gONian INSEE. 
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DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 
PRINTED BY ALEXANDER THOM, 87 & 88, ABBEY-STREET, 
PRINTER TO THE QUEEN'S MOST EXCELLENT MAJESTY. 
FOR HER MAJESTY’S STATIONERY OFFICE, 
1878. 
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