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no date - new fluorescent electric lights have been used to make ordinary-appearing stones glow with soft colors in this globe

PRINCIPLES OF ELECTRONIC BOMBARDMENT

CD 1963084 E&MP 25.021

Electric Lamps

no date

Principles of electronic bombardment which are used in the new fluorescent electric lights have been used to make ordinary-appearing stones glow with soft colors in this globe constructed by A. H. Colby, University of Illinois Physics Department glassblower.

Eight different mineral materials are held in the globe and bombarded by cathode rays.


Original Caption by Science Service
University of Illinois



National Museum of American History

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