The National Geographic Magazine, Volume 112National Geographic Society, 1957 - Geography Indexes kept up to date with supplements. |
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Page 109
... radio . I watched the needle of our radio compass trying to search out the direc- tion from which the signals were coming , but it swung back and forth through a range of 60 degrees , refusing to make up its mind . Still , its average ...
... radio . I watched the needle of our radio compass trying to search out the direc- tion from which the signals were coming , but it swung back and forth through a range of 60 degrees , refusing to make up its mind . Still , its average ...
Page 723
... RADIO 1 122 123 ZENITH TRANS - OCEANIC TUMING BARD ZELIFTOR There can be no finer gift ! The smallest and lightest Band Spread Short Wave Portable Radio ever produced ! TRANSISTORS pro- vide this new Trans - Oceanic Radio with a ...
... RADIO 1 122 123 ZENITH TRANS - OCEANIC TUMING BARD ZELIFTOR There can be no finer gift ! The smallest and lightest Band Spread Short Wave Portable Radio ever produced ! TRANSISTORS pro- vide this new Trans - Oceanic Radio with a ...
Page 799
... radio communications . Such radio communications are possible in the first place because ultraviolet rays of ex- tremely short wave length ionize air particles in the upper ionosphere . This ionization pro- vides a veritable sea of ...
... radio communications . Such radio communications are possible in the first place because ultraviolet rays of ex- tremely short wave length ionize air particles in the upper ionosphere . This ionization pro- vides a veritable sea of ...
Contents
27 | v |
Admiral of the Ends of the Earth By Melville Bell | 36 |
Gypsy Cave Dwellers of Andalusia Spain 572 | 139 |
Copyright | |
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