PEIRCE. — MANNER OP GROWTH OF A CURRENT. 



537 



end of the core affected the results somewhat, and in a manner not easy 

 to treat mathematically ; nevertheless the indications of this coil were 

 interesting and characteristic in their general features, as we shall see 



Figure 21. 



hereafter, of the behavior of the eddy currents in the core near its axis. 

 When a current was started in the coil circuit, the mirror of the oscillo- 

 graph attached to the secondary coil remained sensibly at rest for an 



