Parr 
ike 
TRANSACTIONS (SERIES Il.). 
Vor. J.—Parts 1-25.—November, 1877, to September, 1883. 
Vou. II.—Parts 1-2.—Angust, 1879, to April, 1882. 
Vou. I1J.—Parts 1-14.—Septemher, 1883, to November, 1887. 
Vou. [V.—Parts 1-14.—April, 1888, to November, 1892. 
Vou. V.—Parts 1-13.—May, 1893, to July, 1896. 
Vou. VI.—Parts 1-16.—February, 1896, to August, 1898. 
VOLUME VIL. 
A Determination of the Waye-lengths of the Principal Lines in the Spectrum of Gallium, 
showing their Identity with Two Lines in the Solar Spectrum. By W. N. Hartrey, 
F.R.S., and HuecH Ramaezs, 4.R.0.sc.1. Plate I. (August, 1898.) Is. 
. Radiating Phenomena in a Strong Magnetic Field. Part I1.—Magnetic Perturbations of 
the Spectral Lines. By Tuomas Preston, M.A., D.sc., F.R.S. (June, 1899.) Is. 
. An Estimate of the Geological Age of the Harth. By J. Joty, M.A., B.A.1., D.8C., 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.) 1s. 64. 
. On the Electrical Conductivity and Magnetic Permeability of various Alloys of Iron. By 
W. F. Barrers, F.RS.; W. Brown, B.8c.; R. A. Hapriurp, M. Inst.C.E. Plates 
II. to TX. (January, 1900.) 4s. 
. On some Novel Thermo-Hlectric Phenomena. By W. F. Barrer, F.R.S., Professor of 
Hxperimental Physics in the Royal College of Science for Ireland. Plate 1Xa. (January, 
1900.) Is. 
. Jamaican Actiniaria. Part I1.—Stichodactylinee and Zoanthee. By J. EH. Duxrpen, 
Assoc. I. C. Sc. (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 thie 
Crustacea Schizopoda of Ireland. By Ernest W. L. Hour, and W. I. Beaumont, B.A., 
Cantab. Plate XVI. (April, 1900.) Is. 6d. 
