416 Mr. G. W. Walker. On the Drift produced in [Dec. 16 ; 



/mV Cj _^X a \ an d radius ^(a? + c% w j tn angu i ar velocity ^ 

 It will leave the first pulse with velocity given by 



and describe a straight line until it reaches the second pulse. 

 During the passage through the second pulse we have 



so that 



FIG. 1. Diagram to illustrate the path of the ion. 



FIGS. 2 and 3. Diagrams to illustrate the path of the ion when I 0. 



Case I. a = 0. c = V. 



Case II. a = fad. c V. 





