The Reader's Digest, Volumen37DeWitt Wallace, Lila Acheson Wallace Reader's Digest Association, 1940 |
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Página 93
... light bulb today for 15 cents that in 1931 would have cost 40 cents , and would have delivered only half the present quan- tity of light , is the joke old - timers in General Electric's lamp division used to play on new engineers . They ...
... light bulb today for 15 cents that in 1931 would have cost 40 cents , and would have delivered only half the present quan- tity of light , is the joke old - timers in General Electric's lamp division used to play on new engineers . They ...
Página 102
... light . Lamps fitted with filters which allow only " black light " to pass are concealed in ceilings or walls , and patrons are aware only of a carpet into which light seems to have been woven . These carpets are already in use at some ...
... light . Lamps fitted with filters which allow only " black light " to pass are concealed in ceilings or walls , and patrons are aware only of a carpet into which light seems to have been woven . These carpets are already in use at some ...
Página 13
... light , and magnetic fields as lenses instead of glass , it reveals a world hitherto invisible . There are now three kinds of mi- croscope . The familiar one , which uses ordinary light , takes us into a world where things are magnified ...
... light , and magnetic fields as lenses instead of glass , it reveals a world hitherto invisible . There are now three kinds of mi- croscope . The familiar one , which uses ordinary light , takes us into a world where things are magnified ...
Contenido
Wake Up America | 6 |
No Thoroughfare to Utopia | 13 |
You Doctors | 35 |
Derechos de autor | |
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