The Reader's Digest, Volúmenes36-37DeWitt Wallace, Lila Acheson Wallace Reader's Digest Association, 1940 |
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Página 67
... light from the black box is flashed onto a stream of water which appears continuous under ordinary light . In a moment the stream becomes a chaplet of drops that stand still , queerly misshapen little jewels poised in midair . A turn of ...
... light from the black box is flashed onto a stream of water which appears continuous under ordinary light . In a moment the stream becomes a chaplet of drops that stand still , queerly misshapen little jewels poised in midair . A turn of ...
Página 68
... light is made to flash 1100 times per minute , just as many times as the fan blade is re- volving , the light will always catch the blade marked " M.I.T. " at exactly the same spot , and the let ters not only become visible , but appear ...
... light is made to flash 1100 times per minute , just as many times as the fan blade is re- volving , the light will always catch the blade marked " M.I.T. " at exactly the same spot , and the let ters not only become visible , but appear ...
Página 120
... light did not penetrate deep enough , and nothing could be seen . For a long time poor light and imperfect lenses balked attempts to develop Kussmaul's brilliant idea . But after Edison's invention of the electric light bulb , some of ...
... light did not penetrate deep enough , and nothing could be seen . For a long time poor light and imperfect lenses balked attempts to develop Kussmaul's brilliant idea . But after Edison's invention of the electric light bulb , some of ...
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