TRANSACTIONS (SERIES II-). 
Vou. I.—Parts 1-25.—November, 1877, to September. 1883. 
Vou. II.—Parts 1-2.—August, 1879. to April, 1882. 
Vor. III.—Parts 1-14.—September, 1883, to November, 1887. 
Vor. IV.—Parts 1-14.—April, 1888, to November. 1892. 
Vo... V.—Parts 1-13.—May, 1893, to July, 1896. 
Vou. ViI.—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. McCuutrann, M.A., 
Professor of Experimental Physics, University College, Dublin. (May 17,1905.) 1s. 
II. The Energy of Secondary Radiation. By J. A. McCrietnanp, M.A., Professor of 
Experimental Physics, University College, Dublin. (February 6, 1906.) 1s. 
TIT. Secondary Radiation from Compounds. By J. A. McCiriianp, M.A., Professor of 
Experimental Physics, University College, Dublin, and F. KE. Hacker, M.A., B.Sc. 
(April 12, 1906.) 1s. 
TV. The Absorption of BS Radium Rays by Matter. By J. A. McCirLnanp, M.A., D.Sc. 
Professor of Experimental Physics, University College, Dublin; and F. E. Hackery, 
M.A., B.Sc. (March 21, 1907.) 1s. 
V. Electro-Magnetic Mass. By Arruur W. Conway, M.A., F.R.U.I., Professor of 
Mathematical Physies, University College, Dublin. (March 23, 1907.) Is. 
VI. The Densities and Specific Heats of some Alloys of Iron. By W. Brown, B.Sc. 
(August 23, 1907.) 1s. 
VII. An Investigation of the Connexion between Band and Line Spectra of the same Metallic 
Elements. [Plates I. and LI.] By Walter Noel Hartley, D.Sc., F.R.S., Royal College 
of Science, Dublin. (October 1, 1908.) 2s. 
VIII. The Eruption of Vesuvius in April, 1906. [Plates III.-—XXIII., including two Maps.] 
By H. J. Jounsron-Lavis, M.D., D.Cu., F.G.8., ete., late Professor of Vuleanology in 
the Royal University of Naples. (January 11, 1909.) 6s. 
