Crs) 
PART. 
13.—Of Atmospheres upon Planets and Satellites. By G. Johnstone 
Stoney, M.A., D.SC., F.R.S., F.R.A.S., Vice-President of the Physical 
Society, &. (November, 1897.) 
14.—Jamaican Actiniaria. Part I.—Zoanthee. By J. E. Duerden, assoc. 
r.c.sc. (Lond.), Curator of the Museum of the Institute of Jamaica. 
Plates XVII. a, XVIII. a, XIX., XX. (April, 1898.) 
15.—Radiation Phenomena in a Strong Magnetic Field. By Thomas 
Preston, M.A., F.R.U.I. Plate XXI. (April, 1898.) 
16.—The Actiniaria of Torres Straits. By Alfred C. Haddon, m.a., p.sc., 
Professor of Zoology, Royal College of Science, Dublin. Plates 
XXII. to XXXII. (August, 1898.) [Zvtle-page, Contents, and 
Index to Volume VI., Series II. | 
CONTENTS OF VOLUME VII. (New Szrtzs). 
PART, 
1.—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. Hartley, r.z.s., and Hugh Ramage, 
a.B.c.sc.1. Plate I. (August, 1898.) 
2.—Radiating Phenomena in a Strong Magnetic Field. Part II1.—Magnetic 
Perturbations of the Spectral Lines. By Thomas Preston, m.a., 
D:sc., HRS. (June, 1899.) 
3.—An Estimate of the Geological Age of the Earth. By J. Joly, m.a., 
B.A.I., D.SC., F.R.S., F.G.S., M.R.I.A., Honorary Secretary of the Royal 
Dublin Society; Professor of Geology and Mineralogy in the Uni- 
versity of Dublin. (November, 1899.) 
4.—On the Electrical Conductivity and Magnetic Permeability of various 
Alloys of Iron. By W. F. Barrett, F.x.s.; W. Brown, B.sc.; R. A 
Hadfield, u.tnsr.c.z. Plates II. to TX. (January, 1900.) 
5.—On some Novel Thermo-Electric Phenomena. By W. F. Barrett, ¥.z.s., 
Professor of Experimental Physics in the Royal College of Science 
for Ireland. Plate [X.a. (January, 1900.) 
6.—Jamaican Actiniaria. Part I1.—Stichodactyline and Zoanthee. By 
J. E. Duerden, assoc. z.c.sc. (Lond.), Curator of the Museum of the 
Institute of Jamaica. Plates X.to XV. (January, 1900.) 
7.—Survey of Fishing Grounds, West Coast of Ireland, 1890-1891. 
X.—Report on the Crustacea Schizopoda of Ireland. By Ernest 
W. L. Holt, and W. I. Beaumont, 3.a., Cantab. Plate XVI. 
(April, 1900.) ; 
8. The Action of Heat on the Absorption Spectra and Chemical Constitu- 
tion of Saline Solutions. By W. N. Hartley, F.x.s., Royal College 
of Science, Dublin. Plates XVII. to XXII. (September, 1900.) 
