The sentry nervously stares at the ink-dark night. Among the rustlings of leaves and insects he hears a harder, hostile sound. He raises his rifle and presses an eye to a rubber cup at the end of a tubular scope. Now blackness turns into an eerie green glow; the sentry can see trees, bushes, rocks. If an enemy patrol is creeping toward him, he can spot the moving figures with surprising ease.
So far, such scenes have been acted out only in practice, but the Army's new night-seeing scope is proving so practical that it soon will be made in...
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