TRANSACTIONS (SERIES Il.). 
Vou. I.—Parts 1-25.—November, 1877, to September, 1883. 
Vou. II.—Parts 1-2.—August, 1879, to April, 1882. 
Vou. I1J.—Parts 1-14.—September, 1883, to November, 1887. 
Vor. 1V.—Parts 1-14.—April, 1888, to November, 1892. 
Vou. V.—Parts 1-13.—May, 1893, to July, 1896. 
Vou. VI.—Parts 1-16.—February, 1896, to August, 1898. 
VOLUME VII. 
Parr 
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. Harttey, 
F.R.S., and Hueu RamaG#, A.R.c.sc.1. Plate I. (August, 1898.) Is. 
2. Radiating Phenomena in a Strong Magnetic Field. Part I1.—Magnetic Perturbations of 
the Spectral Lines. By Tomas Preston, M.A., D.sc., F.R.S. (June, 1899.) Is. 
3. An Estimate of the Geological Age of the Harth. By J. Jory, M.A., B.A.1., D.sC., F.R.S., 
F.G.S., M.R.1.A., Honorary Secretary of the Royal Dublin Society; Professor of Geology 
and Mineralogy in the University of Dublin. (November, 1899.) 1s. 64. 
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. Haprisxip, M.Inst.C.H. Plates 
II. toIX. (January, 1900.) 4s. 
5. On some Novel Thermo-EHlectric Phenomena. By W. F. Barrett, F.R.S., Professor of 
Experimental Physics in the Royal College of Science for Ireland. Plate Xa. (January, 
1900.) Is. 
6. Jamaican Actiniaria. Part II.—Stichodactyline and Zoanthes. By J. E. Durrpen, 
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. Hott, and W. I. Beaumont, B.A., 
Cantab. Plate XVI. (April, 1900.) 1s. 6d. 
8. The Action of Heat on the Absorption Spectra and Chemical Constitution of Saline Solutions. 
By W. N. Harttey, 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 Hygroscopic Salts of Copper, Cobalt, 
and Nickel, with respect to Atmospheric Moisture. By W. N. Hartriey, 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 Collimating-Telescope Gun-Sight for Large and Small Ordnance. By Sir Howarp 
Gruss, F.R.S., Vice-President, Royal Dublin Society. PlateX XVI. (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, Cobalt, Nickel, 
Ruthenium, Rhodium, Palladium, Osmium, Iridium, Platinum, Potassium Chromate, 
Potassium Permanganate, and Gold. By W. HE. Aprnry, D.Sc., A.R.C.Sc.1., Curator 
and Examiner in Chemistry in the Royal University of Ireland, Dublin. Plates 
XXVII. and XXVIII. (September, 1901.) 1s. 
12. Banded Flame-Spectra of Metals. By W. N. Harruny, F.R.S., Honorary Fellow of King’s 
College, London; Royal College of Science, Dublin; and Hucu Ramags, B.A, 
A.R.C.8c.1., 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.) 1s. 
14. The Results of an Electrical Experiment, involving the Relative Motion of the Earth and 
ther, suggested by the late Professor FitzGerald. By Frep. 'T. Trouron, D.Sc., 
F.R.S., University Lecturer in Experimental Physics, Trinity College, Dublin. (April, 
1902.) Is. 
