TRANSACTIONS (SERIES Il.). 
Vou. I.—Parts 1-25.—November, 1877, to September, 1883. 
Vou. I1.—Parts 1-2.—August, 1879, to April, 1882. 
Vou. ITI.—Parts 1-14.—September, 1883, to November, 1887. 
Vou. TV.—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. 
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. Harttey, 
F.R.S., and Hueu RamaGe, 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 Tuomas Preston, M.A., D.sc., F.R.S. (June, 1899.) Is. 
3. An Hstimate of the Geological Age of the Harth. By J. Joy, M.A., B.A.1., 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.) 1s. 64. 
4, On the Electrical Conductivity and Magnetic Permeability of various Alloys of Iron. By 
W. EF. Barrerr, F.R.S.; W. Brown, B.Sc.; R. A. Haprieip, M.Inst.C.H. Plates 
II. to TX. (January, 1900.) 4s. 
5. On some Novel Thermo-Hlectric Phenomena. By W. F. Barrett, F.R.S8., Professor of 
Experimental Physics in the Royal College of Science for Iveland. PlateIXa. (January, 
1900.) 1s. 
6. Jamaican Actiniaria. Part I1.—Stichodactyline and Zoanthee. By J. EH. Dusrpen, 
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.) Is. 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. Harriny, 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, I'.R.S., Vice-President, Royal Dublin Society. Plate XX VI. (August, 1901.) Is. 
