On the Fritts selenium cells and batteries. ... and Mr. Sidney E. Shelbournea#39;s inventions are grouped together, including induction circuit cables, diagram indicators for connection of wires, new ... This company exhibits a very handsome pavilion in Section I., No. .... be heard in the telephone with pitch depending upon the velocity of rotation as long as any appreciable charge remained upon the electrode.
|Title||:||The Electrical World|