PROCEEDINGS FOR 1921 XXIII 



recognized in placing them on the retired list of Fellows with retention 

 of title. Their counsel and influence may thus be retained, and at 

 the same time room afforded for the reception of desirable new Fellows. 

 The election of officers for the ensuing year resulted as follows: 

 President, Dr. Otto J. Klotz; Vice-President, Professor J. Watson 

 Bain; Secretary, Mr. John Patterson, M.A. 



The following papers were read in full or by abstract at the 

 Sessions of the Section: 



1. — Presidential Address. Professor J. C. Fields, F.R.S.C. 

 Division in Relation to the i\lgebraic Numbers. 



2." — Ionization Potential and the Size of the Atom. By A. S. 

 Eve, F.R.S.C. 



3.- — Detection of Variation in Electric Earth Currents by Coil 

 and Galvanometer. By A. S. Eve, F.R.S.C, and E. S. Bieler. 



4." — ^The Effective Range of Beta-rays. By Miss V. Douglas, 

 B.A.^and J. A. Gray, D.Sc. Presented by A. S. Eve, F.R.S.C. 



5. — The velocity of Sound in Air and Soil. By J. A. Gray, D.Sc. 

 Presented by A. S. Eve, F.R.S.C. 



6.^ — Properties of X-rays Excited by Beta-rays. By J. A. Gray, 

 D.Sc. Presented by A. S. Eve, F.R.S.C. 



1 .■ — ^The Absorption of Gamma-rays. By J. A. Gray, D.Sc. 

 Presented by A. S. Eve, F.R.S.C. 



8.- — A Note on the Examination of Materials by X-rays. By 

 J. A. Gray, D.Sc. Presented by A. S. Eve^, F.R.S.C. 



9. — The Transmission of Heat through the Thin Boundary Films 

 of Air or of Water at the Surface of Glass. By A. Norman Shaw, 

 D.Sc, and L. A. Smith, B.A. Presented by A. S. Eve, F.R.S.C. 



10.- — ^The Viscosity of Ether at Low Temperatures and of Solu- 

 tions of Acetic Acid in Liquid Hydrogen Bromide. By E. H. Archi- 

 bald, Ph.D., F.R.S.C, C E. Stone and E. M. White. 



n. — Preliminary Report on the Lubricating Properties of the 

 Different Series of Hydrocarbons. By W. F. Seyer, Ph.D. Presented 

 by E. H. Archibald, F.R.S.C 



12.— An Automatic Mercury Pump. By D. F. Steadman. Pre- 

 sented by E. H. Archibald, F.R.S.C. 



13. — Some Results of the Destructive Distillation of British 

 Columbia Alder and Douglas Fir. By W. A. Hardy, B.Sc. Presented 

 by E. H. Archibald, F.R.S.C. 



14.^ — On the Variation of the "emanating power" of Certain 

 Uranium Minerals with Temperature and a New Secondary Radium 



—3 



