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1939 -  new instrument that measures how well streets and roads are lighted

MEASURING BRIGHTNESS

CD 1964093 E&MP27.066

Electric Lighting

December 9, 1939

A new instrument that measures how well streets and roads are lighted.

Mounted on an automobile, it records the true brightness of pavement, brightness of objects along or on the road, interference to seeing caused by glare. Its use may make possible saving of some of the 5000 lives lost annually in traffic accidents merely because motorists could not see safely. 


Original Caption by Science Service



National Museum of American History

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