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1927 - spectacular uses of the Vacuum photocell which the Lange invention will replace

MEASURING THE LIGHT TRANSMITTING PROPERTIES OF STREET LIGHTING GLASSWARE

E&MP 94.020

Photo Electric Cells

October 11, 1927

... some of the more spectacular uses of the Vacuum photocell which the Lange invention will replace.

The Lange invention is simpler, more rugged and gives larger currents.

PHOTO 449709 E-369


Original Caption by Science Service
© GE Publicity Department



National Museum of American History

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