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. 



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, 

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



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



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



3. An Estimate of the Geological Age of the Earth. By J. Joly, m.a., b.a.i., d.so., 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 Alloys of Iron. By 



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

 IL toIX. (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.) l.s. 



6. Jamaican Actiniaria. Part IL— Stichodactylinse and Zoanthese. By J. E. Duerden, 



Assoc. R. C. Sc. (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, 1«90-1891. 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. 6^. 



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. 6rf. 



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



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

 Honorary Fellow of King's College, Loudon ; Professor of Chemistry, Royal College of 

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



10. A New CoUimating-Telescope Gun-Sight for Large and Small Ordnance. By Sir Howard 



Grubb, F.R.S., Vice-President, Royal Dublin Society. Plate XXVI. (August, 1901.) Is. 



11. Pliotographs of Spark Spectra from the Large Rowland Spectrometer in the Royal 



University of Ireland. Part I. The Ultra- Violet Spark Spectra of Iron, Cobalt, Nickel, 

 Ruthenium, Rhodium, Palladium, Osmium, Iridium, Platinum, Potassium Chromate, 

 Potassium Permanganate, and Gold. By W. E. Adeney, D.Sc, A.E.C.Sc.L, Curator 

 and Examiner in Chemistry in the Eoyal Univer.si ty of Ireland, Dublin. Plates 

 XXVII. and XXVIII. (September, 1901.) Is. 



