XXXIV THE ROYAL SOCIETY OF CANADA 



53. — Cavitation in the Propagation of Sound. By R. W. Boyle, 

 F.R.S.C. 



54. — The Function of Resonance as a Part of the Physical Theory 

 of Audition. By Frank Allen, F.R.S.C, and Miss M. Weinberg, M.A. 



55. — Dissociation of Hydrogen by Electron Impacts. By A. LI. 

 Hughes, F.R.S.C. 



56.— The Electrodeless Discharge in Diatomic Gases. By Prof. 

 J. K. Robertson, M.A. Presented by A. L. Clark, Ph.D., F.R.S.C. 



57. — The Manufacture of Cyanogen Compounds in Canada. By 

 Horace Freeman. Presented by Dr. R. F. Ruttan, F.R.S.C. 



58.— The Most Massive Star Known. By J. S. Plaskett, D.Sc, 

 F.R.S.C. 



59. — Criticisms of Saha's Ionization Hypothesis. By H. H. 

 Plaskett. Presented by J. S. Plaskett, D.Sc, F.R.S.C. 



60. — A Centrifuge Test of the Coagulating Power of an Electro- 

 lyte for Colloidal Solutions. By E. F. Burton, Ph.D., F.R.S.C, and 

 J. E. Currie, B.A. 



61. — The Variation in Mobilities of Ions and Colloidal Particles 

 with the Viscosity of the Medium. By E. F. Burton, Ph.D., F.R.S.C, 

 and J. E. Currie, B.A. 



62. — The Mechanism of Catalysis by Nickel and by Platinum. 

 By Maitland C Boswell, F.R.S.C, and R. C Cantelo. 



63.— The Constitution of Rubber. By Maitland C Boswell, 

 F.R.S.C, and R. C Cantelo. 



64. — The Effect of Visual Refîex Action on the Sensation of 

 Colour. By Frank Allen. 



65. — The Variation of the Refractive Index of Oxygen with 

 Pressure and the Absorption of Light by Oxygen at High Pressures. 

 By Miss H. I. Eadie and Professor John Satterly. Presented by 

 Prof. McLennan, F.R.S.C 



On motion of Mr. Patterson, seconded by Dr. Shutt, the report 

 of Section III was adopted. 



REPORT OF SECTION IV 



During the three days of the Annual Meeting, May 17, 18 and 

 19, four sessions of Section IV were held and were attended by the 

 following Fellows, 17 in number: — 



Dr. W. A. Parks, President; Dr. F. D. Adams, Dr. C Camsell, 

 Dr. A. P. Coleman, Dr. W. H. Collins, Dr. D. B. Dowling, Mr. J. A. 

 Dresser, Dr. E. R. Faribault, Mr. W. A. Johnston, Dr. E. M. Kindle, 



