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, 1SS7. 



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



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



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



VOLUME VII. 



Part 



1. A Determination of the "Wave-lengtlis of the Principal Lines in the Spectrum of Gallium, 



showing their Identity with Two Lines in the Solar Spectrum, liy W. N. IIautley, 

 F.R.S., and Hugh Eamage, 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.k.s. (.June, 1899.) Is. 



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



r.G.s., M.R.I. a.. Honorary Seci'etary of the Iloyal Dublin Society ; Professor of Geology 

 and Mineralogy in the University of Dublin. (November, 1899.) 1.?. M. 



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



W. F. Barrett, F.K.S. ; W. Brown, B.Sc. ; E. A. Hadfield, M. Inst. C.E. Piales 

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



5. On some Novel Thermo-Electric Phenomena. By W. F. Barrktt, 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. — Sticliodaetylinoe and Zoanthere. B}' J. E. Dlerdkn, 



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

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



7. Survey of Fisliing Grounds, West Coast of Ireland, 1890-1831. X. — Report on the 



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

 Cantab. Plate XVL (April, 1900.) Is. 6^/. 



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



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

 (September, 1900.) 3s. 6(/. 



9. On the Conditions of Equilibrium of Deliquescent and Hygroscopic Salts of Copjjer, Cobalt, 



and Nickel, with respect to Atmospheric Moisture. By W. N. Hartley, F.R.S., 

 Honorary Fellow of King's College, London; Professor of Cliemistry, Royal College of 

 Science, Dublin. Plates XXIIL, XXIV., and XXV. (July, 1901.) Is. 



