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about 1932 - using Novagem jewels, designed by W. D. A. Ryan, the jewels are electrically agitated, so that they flash by day and by floodlights at night

NOVAGEM

CD 1966098 E&MP36.001

Electric Signs

about 1932

Electric sign, using "Novagem" jewels, designed by W. D. A. Ryan of the G.E. Co. The jewels are electrically agitated, so that they flash by day and by floodlights at night.  


Original Caption by Science Service
General Electric



National Museum of American History

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