XXIV THE ROYAL SOCIETY OF CANADA 



18. — The Coefficient of Viscosity of a Gas — 'An elementary 

 laboratory experiment. By John Satterly, F.R.S.C. 



19. — 'Impact, Harmonic Motion and the Elasticity Moduli — a 

 Laboratory Experiment. By John Satterly, F.R.S.C. 



20.— The Hatchet Planimeter. By John Satterly, F.R.S.C. 



21. — The Practical Study of a Catenary. By John Satterly, 

 F.R.S.C. 



22. — On Certain Expansions in Terms of Cylindrical Functions. 

 By Professor James Harkness, F.R.S.C. 



23. — An Application of a Theorem by Lie on the Torsion of a 

 Curve belonging to a linear complex. By C. T, Sullivan, Ph.D., D.Sc, 

 F.R.S.C. 



24. — The Smelting of Titaniferous Iron Ores. By W. M, Goodwin, 

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



25. — ^The Reaction of certain derivatives of Phthalic Anhydride 

 with Benzene in the presence of Aluminium Chloride. By F. B. 

 Allan, Ph.D., F.R.S.C, and W. A. Lawrence. 



26. — The Preparation of the Three Benzoylbenzoic Acids. By 

 F. B. Allan, Ph.D., F.R.S.C, and M. E. Smith. 



27. — 'Analysis of Earthquake Waves. By Dr. Otto Klotz, 

 F.R.S.C 



28. — 'The Orbit and Dimensions of U Coronae. By J. S. Plaskett, 

 F.R.S.C 



29. — 'The Intensity of the Hydrogen Lines and the Continuous 

 Spectrum in X Cassiopeise. By H. H. Plaskett, B.A. Presented by 

 J. S. Plaskett, F.R.S.C. 



30. — The Alkali-content of Soils as related to Crop Growth. By 

 Frank T. Shutt, D.Sc, F.R.S.C, and A. H. Burwash, B.A. (by title). 



31. — The Electrical Conductivity of Aqueous Solutions of 

 Potassium Chloroplatinate as affected by Hydrolysis. By E. H. 

 Archibald, D.Sc, F.R.S.C. 



32. — A Photographic Study of the Sound Waves from Large 

 Guns and Projectiles with Special Reference to Velocity of Explosive 

 Sounds in Free Air. By Dayton C Miller, Ph.D. Presented by Dr. 

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



33. — -The Measurement of Small Capacities. By E. S. Bieler. 

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



34. — On the Permeability of Thin Fabrics and Films to Hydrogen 

 and Helium. By Professor J. C McLennan, F.R.S.C, and W. W. 

 Shaver, B.A. 



