The National Geographic Magazine, Volume 91National Geographic Society, 1947 - Geography Indexes kept up to date with supplements. |
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Page 313
... developed and improved the magne- tron even further . Radar was " right down Bell men's alley . " Working in peacetime to improve the tele- phone , they had developed new gadgets and " know - how " that fitted into radar like pieces of ...
... developed and improved the magne- tron even further . Radar was " right down Bell men's alley . " Working in peacetime to improve the tele- phone , they had developed new gadgets and " know - how " that fitted into radar like pieces of ...
Page 314
... developed an electrical brain that does all the calculating in a fraction of a second . Its working is not really hard to understand . Into the calcula- tor is fed so much voltage for the plane's speed , so much for its height , so much ...
... developed an electrical brain that does all the calculating in a fraction of a second . Its working is not really hard to understand . Into the calcula- tor is fed so much voltage for the plane's speed , so much for its height , so much ...
Page 316
... developed a soft rubber pad for the ear- pieces of telephone headsets which fitted tightly against the ears and cut down outside noise well enough to permit satisfactory hear- ing when there was no static on the radio . Such earpieces ...
... developed a soft rubber pad for the ear- pieces of telephone headsets which fitted tightly against the ears and cut down outside noise well enough to permit satisfactory hear- ing when there was no static on the radio . Such earpieces ...
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