[ V 1 
LIST OF ILLUSTRATIONS. 
Plate 1.—L)r. Morris W. Travers, Mr. George Sexter, and Dr. xVuriev Jaquerod 
(ni the Measurement of Temperature. Part I.—On the Pressure Coefficients of 
Hydrogen and Helium at Constant Volume and at different Initial Pressures. 
Part II.—On the V^apour Pressures of Liquid Oxygen at Temperatures below 
its Boiling-Point on the Constant-Volume Hydrogen and Helium Scales. 
Part III.—On the Vapour Pressures of Liquid Hydrogen at Temperatures below 
its Boiling-Point on the Constant-Volume Hydrogen and Helium Scales. 
Plates 2 to G. —Mr. J. C. W. Humfrey on the Effects of Strain on the Crystalline 
Structure of Lead. 
Plates 7 to 9.— Professor J. A. Ewixg and Mr. J. C. W. Humfrey on the Fracture 
of Metals under Repeated Alternations of Stress. 
Plates 10 to 20.—Professor Harold B. Dixon on the Movements of the Flame in 
th'e Explosion of Gases. 
Plates 21 to 39.—Drs. Tempest Anderson and John S. Flett on the Eruptions 
of the Soufriere, in St. Vincent, in 1902, and on a Visit to Montagne Pelee, in 
Martinique.—Part 1. 
