TRANSACTIONS (SERIES II.). 



Vol. 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. 



Pam 



1 . A Determination of the Wave-lengths of the Principal Lines in the Spectrum of Q-allium, 



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

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



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., 



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

 and Mineralogy in the University of Dublin. (November, 1899.) Is. 6d. 



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



W. F. Barrett, F.R.S. ; W. Brown, B.Sc. ; R. A. Hadfield, M. Inst. C.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 Royal College of Science for Ireland. Plate IXa. (January, 

 1900.) Is. 



6. Jamaican Actiniaria. Part II. — Stichodactylinse and Zoanthe®. By J. E. Duerden, 



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

 X. to XV. (January, 1900.) 3s. 



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, B.A., 

 Cantab. Plate XVI. (April, 1900.) Is. 6d. 



8. The Action of Heat on the Absorption Spectra and Chemical Constitution of Saline Solutions. 



By W. N. Hartley, F.R.S., Royal College of Science, Dublin. Plates XVII. to XXII. 

 (September, 1900.) 3s. 6cL 



