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. 



Pakt 



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 Ramage, a.r.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. M. 



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



W. F. Barrett, F.R.S. ; W. Brown, B.Sc. ; R. A. Habfield, 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. (Jamxary, 

 1900.) Is. 



6. Jamaican Actiniaria. Part II. — 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 Fisliing 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 XVL (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. 6d. 



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



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

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

 Science, Dublin. Plates XXIII., 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 XXVL (August, 1901.) Is. 



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



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

 Ruthenium, Rliodium, Palladium, Osmium, Iridium, Platinum, Potassium Chiomate, 

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

 and Examiner in Chemistry in the Royal University of Ireland, Dublin. Plates 

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



12. Banded Flame-Spectra of Metals. By W. N. Hartley, F.R.S., Honorary Fellow of King's 



College, London ; Royal College of Science, Dublin ; and Hugh Ramage, B.A., 

 A.R.C.Sc.L, St. John's College, Cambridge. Plates XXIX. to XXXIII. (October, 

 1901.) Is. 



13. Variation: Germinal and Environmental. By J. C. Ewart, M.D., F.R.S., Regius Professor 



of Natural History in the University of Edinburgh. (October, 1901.) Is. 



