IV THE ROYAL SOCIETY OF CANADA 



The Crookes Radiometer. By John Satterly 75 



On Surface Tension, Surface Energy and Latent Heat. By 



John Satterly 83 



The Partial Oxidation of Methane in Natural Gas. By R. T. 



Elworthy 93 



The Formation of Unsaturated Hydrocarbons from Natural Gas. 



By R. T. Elworthy 105 



Use of the Centrifuge in Coagulation of Electrolytes. By E. F. 



Burton and J. E. Currie 109 



The A hsorption and Effective Range of the B-Raysfrom Radium E. 



By Miss A, V. Douglas 113 



Primary and Secondary B-Rays. By J. A. Gray 125 



The Softening Exhibited by Secondary X-rays. By J. A. Gray. 129 

 Arc, Spark and Absorption Spectra of Argon. By W. W. 



Shaver 135 



On the Prism Method of Determining the Refractive Indices of 



Metallic Vapours. By H. G. Smith 145 



The Elctrodeless Discharge in Iodine and in Hydrogen. By 



John K. Robertson 151 



Cavitation in the Propagation of Sound. By R. W. Boyle. . . . 157 



High Frequency Vibrations, and Elastic Modulus of Metal Bars. 



By R. J. Lang 163 



The Reduction of Iron Ores by Carbon Monoxide. By Alfred 



Stansfield and Donald R. Harrison 175 



On the Liquefaction of Hydrogen and Helium. By J. C. 



McLennan and G. M. Shrum 181 



On Infra-Red Spectroscopy. By Mr. V. P. Lubovich and Miss 



E. M. Pearen ., 195 



A Method of Detecting Electrical and Magnetic Disturbances. 



By Brother Philip 213 



On tJie Depression of the Centre of a Thin Circular Disc of Steel 



under Normal Pressure. By Stanley Smith 217 



TJie Vertical Movement of Alkali under Irrigation in Heavy 



Clay Soils. By Frank T. Shutt and Alice H. Atack 227 



The "Alkali" Content of Soils as Related to Crop Groivth. By 



Frank T. Shutt and Alice H. Atack 233 



On Photo-electric Conductivity of Diamond and Other Fluoresce?it 



Crystals. By Miss M. Leat 241 



