(Jury, 1904.) 
THE 
SCIENTIFIC TRANSACTIONS 
OF THE 
MOMeCE ee OUEILIN SOCIETY. 
VOLUME VIII.—(SERIES 11.) 
WAGUE 
THE PENETRATING RADIUM RAYS. 
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: anv 7, BROAD STREET, OXFORD. 
PRINTED AT THE UNIVERSITY PRESS, BY PONSONBY AND GIBBS. . 
1904. 
Price One Shilling. pe 
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