A Geissler tube[1] is an early gas discharge tube used to demonstrate the principles of electrical glow discharge, similar to modern neon lighting. The tube was invented by the German physicist and glassblower Heinrich Geissler in 1857.
invented by Robert Stirling
A Stirling engine is a heat engine that is operated by the cyclic compression…
invented by Thomas Edison
An electric light is a device that produces visible light from electric power.…
invented by Moritz Von Jacobi
Electrotyping (also galvanoplasty) is a chemical method for forming metal parts…
invented by Joseph Henry
A relay is an electrically operated switch. It consists of a set of input…
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