TRANSACTIONS (SERIES II.). 
Vout. I.—Parts 1-25.—November, 1877, to September, 18838. 
Vou. II.—Parts 1-2.—August, 1879, to April, 1882. 
Vou. III.—Parts 1-14.—September, 1888, to November, 1887. 
Vou. 1V.—Parts 1-14.—April, 1888, to November, 1892. 
Vor. V.—Parts 1-18.—May, 1893, to July, 1896. 
Vou. VI.—Parts 1-16.—February, 1896, to August, 1898. 
VOLUME VIL. 
Parr 
Me 
A Determination of the Wave-lengths of the Principal Lines in the Spectrum of Gallium, 
showing their Identity with Two Lines in the Solar Spectrum. By W. N. Harriey, 
F.R.S., and HueH Ramaey, a.R.c.sc.1. Plate I. (August, 1898.) 1s. 
. Radiating Phenomena in a Strong Magnetic Field. Part I1.—Magnetic Perturbations of 
the Spectral Lines. By Tomas Pruston, M.A., D,sc., F.R.S. (June, 1899.) Ls. 
. An Estimate of the Geological Age of the Earth. By J. Joy, M.a., B.A.1., D.SC., F.R.S., 
F.G.S., M.R.1.A., Honorary Secretary of the Royal Dublin Society; Professor of Geology 
and Mineralogy in the University of Dublin. (November, 1899.) Is. 64. 
. On the Electrical Conductivity and Magnetic Permeability of various Alloys of Iron. By 
W. F. Barrer, F.R.S.; W. Brown, B.Sc.; R. A. Hapriexp, M. Inst.0.H. Plates 
II. to TX. (January, 1900.) 4s. 
. On some Novel Thermo-Electric Phenomena. By W. F. Barrer, E.R.S., Professor of 
Experimental Physics in the Royal College of Science for Ireland. Plate Xa. (January, 
1900.) Is. 
. Jamaican Actiniaria. Part I[I].—Stichodactyline and Zoanthee. By J. HE. Durrpen, 
Assoc. R.C. Se. (Lond.), Curator of the Museum of the Institute of Jamaica. Plates 
X.to XV. (January, 1900.) 3s. 
. Survey of Fishing Grounds, West Coast of Ireland, 1890-1891. X.—Report on the 
Crustacea Schizopoda of Ireland. By Ernest W. L. Horr, and W. I. Beaumont, B.A., 
Cantab. Plate XVI. (April, 1900.) Is. 6d. 
. The Action of Heat on the Absorption Spectra and Chemical Constitution of Saline Solutions. 
By W.N. Harrtery, F.R.S., Royal College of Science, Dublin. Plates XVII. to XXII. 
(September, 1900.) 3s. 6d. 
