CONTENTS 



I. PROPERTIES OF AN ELECTRIC CHARGE, 1 



Charge in Uniform Motion, ----- 3 



Transmission of Energy, - - - - - - 6 



Accelerated Charge, 7 



II. ELECTRIC INERTIA, - - - - - - - 11 



Electrical Inertia or Mass continued, 12 



Effect of Concentration, - - - ,,-.,- - 15 



Summary, 16 

 Historical Remarks, - - - - --17 



III. FORESHADOWING OF THE ATOM OR INDIVISIBLE 



UNIT OF ELECTRICITY, - - ; . ~ . 19 



IV. FORESHADOWING OF THE ELECTRON, - - - 24 



Separate Existence of the Electric Unit suggested 



by Conduction in Gases, 24 



Cathode Bays, --26 



Nature of the Cathode Rays, 30 



V. DETERMINATION OF SPEED AND ELECTROCHEMICAL 



EQUIVALENT OF CATHODE RAYS, - - 41 

 Further Measurements of Cathode Ray Velocity 



and m/e Ratio by Aid of Electrostatic Deflection, 47 

 Measuring Velocity by Combined Electric and 



Magnetic Deflexion Method, - - ''. , - 50 



Effect on Lenard Rays, - - - - - 52 

 Direct Determination of the Speed of Cathode . 



Rays, 54 



