Science: Wartime Technology, Apr. 5, 1943

Scientific signs of wartime:

> Nylon monafilaments, once strung on tennis racquets and stretched between hook & line as fishing leaders, are now used as surgical sutures.

> Foamed-rubber latex, familiar stuffing for auto upholstery, now seals airplanes' bomb doors and cabins, cushions flight-control instruments, earphones and helmets. It weatherstrips tanks against sand and water, protects crews from bumps.

> United States Rubber Co. calls its new extrusion method "the most important improvement in rubber processing in many years." Developed for tank treads, the process squirts rubber through tiny holes into molds under...

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