TRANSACTIONS (SERIES Il.). 
Vou. I.—Parts 1-25.—November, 1877, to September, 1883. 
Vou. II.—Parts 1-2.—August, 1879, to April, 1882. 
Vou. ILI.—Parts 1-14.—September, 1888, to November, 1887. 
Vor. IV.—Parts 1-14.—April, 1888, to November, 1892. 
Vou. V.—Parts 1-138.—May, 1893, to July, 1896. 
Vor. VI.—Parts 1-16.—February, 1896, to August, 1898. 
Vou. VII.—Parts 1-16.—August, 1898, to September, 1902. 
Vou. VIJI.—Parts 1-16.—September, 1902 to March, 1905. 
VOLUME IX. 
Parr 
1. On Secondary Radiation (Part II.), and Atomic Structure. By J. A. McCietianp, M.A., 
Professor of Experimental Physics, University College, Dublin. (May 17,1905.) 1s. 
