TRANSACTIONS (SERIES Il.). 
Vou. I.—Parts 1-25.—November, 1877, to September, 1883. 
Vou. II.—Parts 1-2.—August, 1879, to April, 1882. 
Vou. III.—Parts 1-14.—September, 1883, to November, 1887. 
Vor. IV.—Parts 1-14.—April, 1888, to November, 1892. 
Vout. V.—Parts 1-13.—May, 1893, to July, 1896. 
Vor. VI.—Parts 1-16.—February, 1896, to August, 1898. 
Vor. VII.—Parts 1-16.—August, 1898, to September, 1902. 
Vou. VIJI.—Parts 1-16.—September, 1902 to March, 1905. 
VOLUME IX. 
Part 
1. On Secondary Radiation (Part II.), and Atomic Structure. By J. A. McCienuanp, M.A., 
Professor of Experimental Physics, University College, Dublin. (May 17,1905.) Is. 
II. The Energy of Secondary Radiation. By J. A. McOtrentanp, M.A., Professor of 
Experimental Physics, University College, Dublin. (February 6, 1906.) 1s. 
III. Secondary Radiation from Compounds. By J. A. McCieLuanp, M.A., Professor of 
Experimental Physics, University College, Dublin, and F. H. Hacker, M.A., B.Sc. 
(April 12, 1906.) 1s. 
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