[Aprit 12, 1906. | 
THE 
SCIENTIFIC TRANSACTIONS 
OF THE 
MOM we OWS IN SOCTERT Vv. 
VOLUME IX._(SERIES IL) 
IOC. 
SECONDARY RADIATION FROM COMPOUNDS. 
BY 
J. A. McCLELLAND, M.A., 
Professor of Experimental Physics, University College, Dublin, 
AND 
FP, EH. HACKETT, M.A., B.Sc. 
DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY, 
LEINSTER HOUSE, DUBLIN. 
WILLIAMS AND NORGATEH, 
14, HENRIETTA SLREET, COVENT GARDEN, LONDON, W.C. 
PRINTED AT THE UNIVERSITY PRESS, BY PONSONBY AND GIBBS. 
1906. 
Price One Shilling. 
