Fun facts about john ambrose fleming

The story begins with that great American inventor, Thomas Edison. In 1883, he probed inside an incandescent light bulb, first with a wire and then with a metal plate. He found that if this electrode was connected to the positive end of the filament via a galvanometer then a current was detected. If it was connected to the negative end, no current flowed. A little later, using a s

What did john ambrose fleming invent

John ambrose fleming autobiography of a face analysis

Lucy grealy photo