•_>:<; WenHohr—A Study of th Time Interval in a 



connected with the tripping magnet, we would have a device 

 for breaking a circuit for an overload in a time which was 



some inverse function of the current in the line 



On account of its high temperature coefficient, iron wire was 

 chosen for EF and DC. The wire used was 0-01 cm in diameter. 

 ^'Advance" wire was chosen for I V and VC on account of 

 its practically zero temperature coefficient. EF and DC were 





