﻿114 Dr. W. H. Eccles on the Effect of Electrical 



connected with the slope of the hysteresis curve. On the 

 whole the curves tend to corroborate the fact — first noted by 



Fiff. 2. 



50 



100 



150™!*™ ZOO H 



E. Wilson in his 1902 patent specification — that the sensi- 

 bility of the iron to oscillations is greatest when in the 

 magnetic condition represented by the point of inflexion on 

 the hysteresis curve. To examine this matter more closely 



Fig. 3. — The dotted curve shows spark-effect. 



these curves representing the effect of the spark are repeated 

 in figs. 3, 4, 5, 6, each alongside the gradient curve, that is, 



