Tesla holding a gas-filled phosphor coated wireless light bulb which he developed in the 1890's, half a century before fluorescent lamps come into use. Published on the cover of the Electrical Experimenter in 1919.
Tesla holding a gas-filled phosphor coated wireless light bulb which he developed in the 1890's, half a century before fluorescent lamps come into use. Published on the cover of the Electrical Experimenter in 1919.
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