MERCURY VAPOR LAMP

CD 1964068 E&MP27.030

Electric Lighting

1937

Very efficient as a source of light is the excited vapor of a gas. Above Dr. J. W. Marston of the Westinghouse Co. inspects a new experimental water-cooled, high-intensity mercury vapor lamp. The blazing center of its arc steam is as bright as the sun. 

Original Caption by Science Service
^©Westinghouse