High In the night sky over Rochester, N. Y., a billion-candlepower light bomb exploded with a flash that illuminated a five-mile area with brightness approaching the light of day. The instant that this light reached its peak, a photoelectric cell tripped the shutter of an aerial camera housed in an observation plane flying a mile above the city, resulting in a remarkably clear picture of the area. This was one of recent tests conducted by the U. S. Army under the direction of Major George W. Goddard, photographic expert, to prove the ability of new secret equipment to penetrate camouflage that could hide an enemy’s military objectives from the camera’s eye in ordinary daylight. Various colored flashes, it was determined, work best with certain types of color film, and camouflage that cannot be detected in the light of one color may be revealed plainly in another. Then, too, light coming from a single source produces shadows which bring ground objects into better relief than they appear in diffused daylight coming in all directions from the sky.