[May 17, 1905.) 
THE 
SCIENTIFIC TRANSACTIONS 
OF THE 
mowers WUBEIN. SOCERTY. 
“VOLUME IX.—(SERIES IL) 
ie 
ON SECONDARY RADIATION (PART II.), AND ATOMIC STRUCTURE. 
BY 
J. A. McCLELLAND, M.A., 
Professor of Experimental Physics, University College, Dublin. 
DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 
WILLIAMS AND NORGATE, 
14, HENRIETTA STREET, COVENT GARDEN, LONDON ; 
20, SOUTH FREDERICK STREET, EDINBURGH: anp 7, BROAD STREET, OXFORD. 
PRINTED AT THE UNIVERSITY PRESS, BY PONSONBY AND GIBBS. 
1905. 
Price One Shilling. 
