The following Papers are published, or destined to be published, in 
the Screntiric TRANSACTIONS OF THE Royat Dvuriin Socrery, 
Vol. VII., vis.:— 
I. 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. Harry, r.z.s., 
and Hueu Ramaer, a.r.c.sc.1. (Plate I.) 
II. Radiating Phenomena in a strone Magnetic Field. Part II1.— 
Magnetic Perturbations of the Spectral Lines. By Tomas 
PRESTON, M.A., D.SC., F.R.S. 
III. An HKstimate of the Geological Age of the Harth. By J. Jory, 
M.A.) B.A.I., D.SC., F.R.S., F.G.S., Honorary Secretary of the 
Royal Dublin Society ; Professor of Geology and Mineralogy 
in the University of Dublin. 
IV. On the Electric Conductivity and Magnetic Permeability of an 
extensive series of Steel Alloys. By W. F. Barrer, rF.z.3s., 
W. Browns, B.sc., and R. A. Haprienp. (Plates IL. to IX.) 
V. On some Novel Thermo-Hlectric Phenomena. By W. F. Barrer, 
F.R.S., Professor of Experimental Physics in the Royal College 
of Science for Ireland. (Plate IX.) 
VI. Jamaican Actiniaria. Part IJ.—Stichodactyline and Zoanthee. 
By J. HK. Duzrpen, assoc. B.c.sc. (LonD.), Curator of the Museum 
of the Institute of Jamaica. (Plates X. to XV.) 
VII. Survey of Fishing-grounds, West Coast of Ireland, 1890-1891. 
X.—Report on the Crustacea Schizopoda of Ireland. By 
Ernest W. L. Hott and W. I. Bravumonrt, B.a. (Cantab.). 
(Plate XVI.) 
ERRATUM. 
At p. 35, line 3 from bottom, and p. 36, lines 10, 12, and 14 from top, for ‘‘ Loch”’ 
read ‘* Lough.”’ 
