A high-frequency induction furnace plant for the manufacture of special alloys

H. N. Shaw: I should like to ask what the over-all efficiency of that high-frequency induction furnace really is? That is, the ratio of the B. t. u. put into the motor to the B. t. u. actually developed in the iron of the furnace. It seems to me that there would he other applications if that efficiency is at all high. Offhand, it would seem to me to be quite low.