XXXIl ROYAL SOCIETY OF CANADA 



16. — " Some Peculiar Effects resulting from the Distribution of 

 the Intensity of the Radiation from Radioactive Sources." By Prof. 

 E. Rutherford, F.R.S. 



17.—" A New Product of Actinium." By 0. Hahn, Ph.D. Pre^ 

 sented by Prof. Rutherford. 



18. — " The Origin of the /? rays from Radioactive Substances." 

 By W. Levin, Ph.D. Presented by Prof. Rutherford. 



19. — " Isomorphism as Illustrated by Certain Varieties of Mag- 

 netite." By Dr. B. J. Harrington. 



20. — " An Investigation on the Value of the Indentation Test for 

 Steel Rails." By H. K. Dutcher, M.Sc. Presented by Dean Henry 

 T. Bovey. 



21. — " On the Effect of Dissolved Gases on Metal Surfaces." By 

 Dr. H. M. Tory. Presented by Dr. H. T. Barnes. 



22. — " On Vectors considered as Numbers affected with Sign and 

 Bearing." By Dr. J. C. Glashan. 



23. — " A Method of determining the Specific Heat of ^G-ases. By 

 Dr. H. T. Dawes. Presented by Prof. J. C. McLennan. 



The Secretary of the Section, Mr. Lawrence M. Lambe, presented 

 tlie 



Report of Section IV. 



Section IV. begs to report that its sessions, four in number, have 

 been unusually well attended, and the number of papers presented larger 

 than for some years past. 



The average attendance o£ members of the section was eighteen, 

 there being also a number of visitors from other sections and from 

 the general public. 



Twenty-nine papers in all were read before the section, in full, 

 in abstract or by title, four of these being presented by gentlemen not 

 members of the Society. 



Some most interesting discussions took place on points suggested 

 by many of the papers. 



The following officers were elected for the coming year: — 



President — Professor Edward E. Prince. 



Vice-President — Professor Frank D. Adams. 



Secretary — Mr. Lawrence Lambe. 



Lawrence Lambe, 



Secretary. 



