To Which Is Added The Edison Electric Light Meter, By Francis Jehl; The Economy Of The Electric Light By Incandescence, By John W. Howell; And On The Steadiness Of The Electric Current, By C. W. Siemens.
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To Which Is Added The Edison Electric Light Meter, By Francis Jehl; The Economy Of The Electric Light By Incandescence, By John W. Howell; And On The Steadiness Of The Electric Current, By C. W. Siemens.
Read Less