The National Geographic Magazine, Volume 55National Geographic Society, 1929 - Geography Indexes kept up to date with supplements. |
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Page 638
... young ; but while some will do this , others will not . It all depends upon the acquired or momentary balance between caution and fear , as dic- tated by experience , or upon the resultant of their inherited and acquired powers . The ...
... young ; but while some will do this , others will not . It all depends upon the acquired or momentary balance between caution and fear , as dic- tated by experience , or upon the resultant of their inherited and acquired powers . The ...
Page 640
... YOUNG EAGLES PASS MUCH TIME PREENING In from four to five weeks the young are hatched in white down , which con- trasts sharply with their dark eyes and their almost black , hooked bills . This natal covering is shortly replaced with at ...
... YOUNG EAGLES PASS MUCH TIME PREENING In from four to five weeks the young are hatched in white down , which con- trasts sharply with their dark eyes and their almost black , hooked bills . This natal covering is shortly replaced with at ...
Page 651
... young and old birds , and the strange scene was reversed ; for upon its return to the floor of the eyrie the second bird became the " parent , " and the other , promptly leaving the carcass , trailed after it , spreading its wings and ...
... young and old birds , and the strange scene was reversed ; for upon its return to the floor of the eyrie the second bird became the " parent , " and the other , promptly leaving the carcass , trailed after it , spreading its wings and ...
Contents
Map of Discovery Western Hemisphere Reproduction in colors of the painting | 93 |
Turkey Goes to School By MAYNARD OWEN Williams | 95 |
Adventures of the National Geographic | 109 |
Copyright | |
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