Science: Blackout Glow

As war darkens or dims U.S. cities, their onetime incandescence will be replaced more & more by the ghostly luminescence of pigments which give off light in the dark. Today luminescent pigments are being produced in the U.S. at 500 times their rate before the war. Their makers, well nigh luminescent with delight, hope to produce before year's end 100 times as much as they did in 1941.

Luminescent pigments outline the instruments in the lightless cabins of all night-flying U.S. bombers. In blacked-out fortresses and cities, they are more than a novel convenience;...

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