TRANSACTIONS (SERIES II.). 



YoL. I.— Parts 1-25.— November, 1877, to September, 1883. 



Vol. II.— Parts 1-2.— August, 1879, to April, 1882. 



Vol. III.— Parts 1-14.— September, 1883, to November, 1887. 



Vol. IV.— Parts 1-14.— April, 1888, to November, 1892. 



Vol. v.— Parts 1-13.— May, 1893, to July, 1896. 



Vol. VI.— Parts 1-16.— February, 1896, to August, 1898. 



VOLUME VII. 



Pari 



1. A Determination of the Wave-leugtbs of the Principal Lines in the Spectrum of Grallium, 



showing their Identity with Two Lines in the Solar Spectrum. By "W. N. Hahtley, 

 F.R.S., and Hugh Ramage, a.r.c.sc.i. Plate I. (August, 1898.) Ls. 



2. Radiating Phenomena in a Strong Magnetic Field. Part II. — Magnetic Perturbations of 



the Spectral Lines. By Thomas Preston, m.a., d.sc, f.r.s. (June, 1899.) Is. 



3. An Estimate of the Geological Age of the Earth. By J. Joly, m.a., b.a.i., d.sc, f.r.s., 



P.G.S., M.R.I. A., Honorary Secretary of the Eoyal. Dublin Society ; Professor of Geology 

 and Mineralogy in the University of Dublin. (November, 1899.) l.s. 6'/. 



4. On the Electrical Conductivity and Magnetic Permeability of various Alloys of Iron. By 



W. F. Barrett, F.E.S. ; W. Brown, B.Sc. ; E. A. Hadfield, M. lust. O.E. Plates 

 II. to IX. (January, 1900.) 4s. 



5. On some Novel Thermo-Electric Phenomena. By W. F. Barrett, F.R.S., Professor of 



Experimental Physics in the Eoyal College of Science for Ireland. Plate IXa. (Januarj', 

 1900.) Is. 



6. Jamaican Acliniaria. Part II. — Stichodactylime and Zoantliese, By J. E. Duerden, 



Assoc. R. C. Sc. (Lond.), Curator of the Museum of the Institute of Jamaica. Plates 

 X. to XV. (January, 1900.) Ss. 



7. Survey of Fishing Grounds, West Coast of Ireland, 1890-1891. X. — Report on the 



Crustacea Schizopoda of Ireland. By Ernest W. L. IIolt, and W. I. Beaumont, B.A., 

 Cantab. Plate XVI. (April, 1900.) Is. Qd. 



