the High- Tension Magneto. 



295 



slower component (for the same values of the period) in a 

 ratio of the order of 1/c. But experiment shows that the 

 damping of the more rapid component is very much less than 

 that of the slower, and that both in its magnitude and in the 

 sense of its change with the period, it agrees much more 

 nearly with that calculated. 



It should be remembered, of course, that the damping 

 coefficients of the two components are determined in some- 

 what different conditions. The rapid component is only 

 investigated when one of the two windings is short-circuited 

 and the period of the slower component is infinite. It cannot 

 be concluded immediately that, when the two periods are of 

 the same order of magnitude, the damping of the more rapid 

 component is as much less than that of the slower as fig. 5 



Fisr. 5. 



;-o 















a?© 













©°s, 



©^ 





Ss^ 









x k£* 









— o__ 





*7 



s 



k ~ 



s 







A r (cs/cj 







20 



30 



.50 



Tfor r'Jx/O sec. 



would indicate. Evidence on this point is not available. It 

 could only be obtained by the careful analysis of many 

 complete wave-forms in which the two periods were of the 

 same order, and the experiments have been brought to an 

 end before a sufficient number of such wave-forms have been 

 traced with the necessary accuracy. But such evidence as 

 there is certainly indicates that, even when the periods of the 

 two components are of the same order, the damping of 



