CONTENTS. Xk 



TRANSACTIONS OF THE SECTIONS. 



Section A.— MATHEMATICAL AND PHYSICAL SCIENCE. 



THURSDAY, AUGUST I'd. 



Page- 

 Address by Professor A. R. Foksyth, MA., D.Sc, F.Pi.S., President of the 



Section 541 



1. Report on Seismological Investigations ... 549' 



2. Report on Electrolysis and Electro-chemistry 5-50' 



3. On the Unification of Time. By John A. Patterson, M.A 550 



4. Preliminary Note on Photographic Records of Objective Combination 



Tones. By A. W. RticKER, F.R.S., R. W. Forsyth, and R. So-\vier ... 551 



FRIBA T, AUG UST 20. 



1. On the Determination of the Surface Tension of Water, and of certain 



Dilute Aqueous Solutions by means of the Method of Ripples. By 

 N. Ernest Dorset, Ph.D 551 



2. On a New Method of Determining the Specific Heat of a Liquid in terms 



of the International Electrical Units. By Professor H. L. Callendae, 

 M.A., F.R.S., and H. T. Barnes, M.A.Sc 5-52^ 



3. On the Behaviour of Argon in X-Ray Tubes. By Professor H. L. Callen- 

 dae, M.A., F.R.S., and N. N. Evans, M.A.Sc 5-53 



4. On the Fuel Supply and the Air Supply of the Earth. By Lord Kelvin, 

 F.R.S 553 



6. A Canadian and Imperial Hydrographic Survey. By Professor Alex- 

 ander Johnson, M.A., LL.D 554 



6. On the Specific Heat of Superheated Steam. By Professor J. A. Ewing, 

 F.R.S., and Professor Stanley Dunkeeley 554 



7. *New Varieties of Kathode Rays. By Silvanus P. Thompson, F.R.S. ... 555 • 



8. On the Spectra of Oxygen, Sulphur, and Selenium. By C. Runge and 



F. Paschen 5-55 



9. The Influence of Pressure on Spectral Lines. By J. Larmor, F.R.S. ... 555 



10. Changes in the Wave-frequencies of the Lines of Emission Spectra of 



Elements. By W. J. Humphreys 556 



1 1 . *An Experiment with a Bundle of Glass Plates. By Professor Silt anus 



P. Thompson, F.R.S 557 



12. *A Tangent Galvanometer. By Professor Siltanus P. Thompson, F.R.S. 557' 



13. On the Constitution of the Electric Spark. By Arthur Schuster, F.R.S. 557 



