PEANUT TUBES

CD 1964054 E&MP27.012

Electric Light

1937

A small globule of metallic mercury in a tiny quartz tube about the size of a roasted peanut, vaporizes when submitted to an electrical discharge and emits a brilliant glow of light which is remarkably like sunlight in its color and ultra violet composition.

Developed by Dr. John W. Marden, assistant director of research of the Westinghouse Lamp Company, it is man’s brightest source of light holding any practical possibilities and may eventually revolutionize the science of artificial illumination. 

Original Caption by Science Service
^©Westinghouse