LXXIV ROYAL SOCIETY OF CANADA 



questing the Government to take into consideration the advisability of 

 enquiring into the possibility, by proper legal enactment, of preserving 

 the purity of our waterways from contamination by the practice of 

 throwing the sewage of cities, towns, villages, hamlets, and private resid- 

 ences into the rivers; preventing the contamination of the rivers by the 

 dumping of the sewage from vessels navigating the rivers unless such 

 sewage be treated in such a way as to remove septic material therefrom; 

 establishing a minimum standard of purity for the effluent water of 

 such sewage purifeation works and creating some authority to see to the 

 efficient carrying out of such purification. 



E. Deville, 



Secretary. 



On motion of Dr. Deville, seconded by Dr. Girdwood, the report of 

 Section III was adopted. 



List of Papers Eead. 



1. — Presidential Address — The Physical Constants of Ice. By Dr. 

 H. T. Barnes, President of the section. 



2.— Effect of the Wind on Currents and Tidal Streams. By W. 

 Bell Dawson, D.Sc, Superintendent of Tidal Surveys. 



3. — Microseisms. By Otto Klotz, LL.D. 



4. — Slit Width and Errors of Measurement in Stellar Kadial Veloci- 

 ties Determinations. By J. S. Plaskett, B.A. 



5. — Eate of the Standard Clock of the Dominion Observatory. By 

 E. M. Stewart, M.A. 



6. — Errors of Transit Observations. By E. M. Stewart, M.A. 



7. — Convection and Stellar Variation. By Ealph E. DeLury. 



8. — Effect of Temperature on the Solubility of Thorium Emanation 

 in certain Liquids. By E. W. Boyle, Ph.D. Presented by Dr. H. T. 

 Barnes. 



9. — On the Daily Variations in the Conductivity of Air in Closed 

 Vessels. By G. A. Cline. Presented by Prof. J. C. McLennan. 



10. — On the Active Deposit from Actinium. By W. T. Kennedy, 

 B.A. Presented by Professor J. C. McLennan. 



11. — On an Improvement in the Method of Determining Minimum 

 Spark Potentials. By Mr. Fierheller. 



12. — On the Charge Acquired by Potassium Salts when Insulated in 

 High Vacua. By Professor J. C. McLennan. 



13. — On the Amount of Eadium in Sea Water. By A. S. Eve, M.A., 

 D.Sc, Associate Professor of PJiysics, at McGill University. Presented 

 by Dr. H. T. Barnes. 



