TABLE OF CONTENTS III 



SECTIOiN III. 



Presidential Address. — The War and Science. By A. Stanley 



Mackenzie 1 



Constitution of Certain Polynitro .Compounds. By J. Bishop 



Tingle and Walter Albert Lawrance 7 



Stearic and Palmitic Esters of the Isomeric Propylene Glycols. 



By L. Isabel Howe 13 



The Com pounds of Phenol and the Cresols with Pyriditie Abstract. 



By F. W. Skirrow and T. V. Binmore ]^) 



On an Electrical Method of Determining the Lime Requirements 



of Soils. By C. J. Lynde 21 



llie Composition of Bran and Shorts as Milled under Regulations 



of the Canada Food Board. By Frank T. Shutt and 



Roy L. Dorrance 27 



Some Notes on the Halifax Explosion. By Howard L. Bronson 31 

 The Transmission of Earthquake Waves. By Otto Klotz. ... 37 



The Application of Wireless by the Dominion Observatory for 



Longitude Determinations. By R. M. Stewart 43 



Air and the Law of Corresponding States. By A. L. Clark ... 47 



The Angle of Contact on Glass Made by Mercury when covered 



with Another Liquid. By A. L. Clark 51 



Periodic Precipitation. By Miss A. W. Foster 55 



Regularities in the Spectra of Lead and Tin. By R. V. Zumstein 59 

 New Lines in the Extreme Ultra- Violet of Certain Metals. By 



D. S. Ainslie and D. S. Fuller 65 



The Adsorption of Helium by Charcoal. By Stuart McLean . . 79 



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



Frank T. Shutt and E. A. Smith 83 



A Comparative Study of Magnetic Declination at Agincourt and 



Meauook during the year 1917 . B>' W. E. W. Jackson 99 

 Summary of Fog-Signal Researches carried out at Father Point, 



Que., 1913 and 1917. By Louis V. King 109 



On the Penetration of Frost in Concrete Structures. By Louis V. 



King 115 



The Carbonization of Lignites. Part IL Large Laboratory Tests. 



By Edgar Stansfield and Ross E. Gilmore 121 



A Comparison of Anemometers under Open Air Conditions. By 



A. Norman Shaw 131 



The Use of a Simple Form, of Pitot-Tube Under Open Air Con- 

 ditions. By A. Norman Shaw 135 



On the Embodiment in Actual Numbers of the Kummer Ideals in 



the Quadratic Realm. By J. C. Glashan 139 



