Science: Clouds and the War

As the devil said to Noah, "It's bound to clear up."—Anon.

As every airman knows, it is also sometimes bound to get cloudy—a fact that has saved and cost many combat flyers' lives. Because clouds are one of the important military concerns of World War II,* scientists have recently taken to more intensive cloud-gazing. Last week an unusually lucid explanation of the function of clouds in war was presented by an old cloud man, William J. Humphreys (retired) of the U.S. Weather Bureau, in a new book, Fog, Clouds and Aviation (Williams & Wilkins;...

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