The National Geographic Magazine, Volume 113National Geographic Society, 1958 - Geography Indexes kept up to date with supplements. |
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Page 146
Mirror guaranteed to give theoretical limit of resolution . Rack and pinion focusing , hardwood tripod ... Gives you the greatest possible field with the ability to observe faint objects with only slight magnification .
Mirror guaranteed to give theoretical limit of resolution . Rack and pinion focusing , hardwood tripod ... Gives you the greatest possible field with the ability to observe faint objects with only slight magnification .
Page 307
4 % " REFLECTING ASTRONOMICAL TELESCOPE ! With this scope you can see everything as above but with greater power plus will split finer stars . Mirror has twice the light gathering power . Mirror guaranteed to give theoretical limit of ...
4 % " REFLECTING ASTRONOMICAL TELESCOPE ! With this scope you can see everything as above but with greater power plus will split finer stars . Mirror has twice the light gathering power . Mirror guaranteed to give theoretical limit of ...
Page 413
Eric Hosking Polka - dot Crest and Prison Stripes Give the Hoopoe a Gaudy Ensemble " Hoop , hoop , hoop ! ” Hoopoe earned its name with its hooting call . Black - tipped feathers give the erected crest the look of a jeweled crown .
Eric Hosking Polka - dot Crest and Prison Stripes Give the Hoopoe a Gaudy Ensemble " Hoop , hoop , hoop ! ” Hoopoe earned its name with its hooting call . Black - tipped feathers give the erected crest the look of a jeweled crown .
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