Medicine: Better Arm

Artificial arms & legs are still in the Model T era; changes come slowly, are often mere tinkering. But last week the Veterans Administration had good news of a sort for the 17,000 World War II amputees. It had approved a new arm & leg which embodies some useful improvements. They were produced, oddly, not by limb experts but by an aviation company, Northrop Aircraft.

Northrop was persuaded to go out on the limb because of its experience in working with light materials. Designed by a crew of engineers, the Northrop arm is a plastic and aluminum affair weighing half a pound...

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