Large Induction Coil Manufactured In Philadelphia for the Japanese Government.
[[http://www.machine-history.com/Large%20Induction%20Coil%201901|See article here]]
[http://www.machine-history.com/Large%20Induction%20Coil%201901|Scientific American January 5 1901] Thirty two inch sparks created by a large induction coil.
A NEW INDUCTION COIL.
BY PROF. W. C. PECKHAM.
When the discovery of the Roentgen rays was announced five years ago, the induction coil was in the condition in which it had been for many years. There had been no demand for its development. It was regarded as an instrument for the display of certain striking and beautiful electrical effects but of little value even for purposes of instruction.