The National Geographic Magazine, Volume 112National Geographic Society, 1957 - Geography Indexes kept up to date with supplements. |
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Quality by by Zenith in the Radio for Travelers THIS TINY , TUBELESS 7 TRANSISTOR RADIO PERFORMS WHERE OTHERS FAIL ZENITH ZENITH ROYAL " 500 " POCKET RADIO Plays in trains , planes , boats , automobiles . ⚫ 7 transistors ( not just 4 ...
Quality by by Zenith in the Radio for Travelers THIS TINY , TUBELESS 7 TRANSISTOR RADIO PERFORMS WHERE OTHERS FAIL ZENITH ZENITH ROYAL " 500 " POCKET RADIO Plays in trains , planes , boats , automobiles . ⚫ 7 transistors ( not just 4 ...
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 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 ...
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aboard Admiral Admiral Dufek Air Force Alan Villiers American Antarctic Antarctica beach birds boat booklet Bounty butterfly Byrd CALIFORNIA called camera Catalog City coast College color Dept desert elephant engine Exakta expedition explorers feet fish flamingos Fletcher Christian forest Grosvenor Hopi Indian Insurance Company Island Kachinas Kodachromes land light Little America living look Luis Marden mahout Mayflower Mayflower II McMurdo McMurdo Sound MELVILLE BELL GROSVENOR Mention the National miles MILITARY Mountains NATIONAL GEOGRAPHIC MAGAZINE National Geographic Society National Geographic-It identifies Navy night Palm Park Photographer Pitcairn plane polar pool Prince Philip radio River Robert Robert College rock Royal sail School Scott ship Siple snow Sound South Pole Station Sucaryl tide tion trees United Valley visitors Washington watch weather West White Sands wind winter York