The National Geographic Magazine, Volume 74National Geographic Society, 1939 - Geography Indexes kept up to date with supplements. |
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Page 125
... rising . Upon that mighty thermal current a graceful glider rides . Towed aloft by a powered plane , Peter Riedel ... rising faster than the plane is sinking . Con- sequently the sailplane rises . A good anal- ogy is that of a man ...
... rising . Upon that mighty thermal current a graceful glider rides . Towed aloft by a powered plane , Peter Riedel ... rising faster than the plane is sinking . Con- sequently the sailplane rises . A good anal- ogy is that of a man ...
Page 127
... rising . In a patch of sunshine against a near - by wall I can see the shadows of this heated air , vigorously boiling upward . I tear a few shreds from a dustcloth in my desk , hold them over the radiator , and up they go , to the ...
... rising . In a patch of sunshine against a near - by wall I can see the shadows of this heated air , vigorously boiling upward . I tear a few shreds from a dustcloth in my desk , hold them over the radiator , and up they go , to the ...
Page 136
... rising at 15 feet or so a second , while two other planes , one directly above and the other below , were getting no lift at all . The result was confirmation of the theory that the warm air rises in a succession of enormous bubblelike ...
... rising at 15 feet or so a second , while two other planes , one directly above and the other below , were getting no lift at all . The result was confirmation of the theory that the warm air rises in a succession of enormous bubblelike ...
Contents
GuamPerch of the China Clippers By Margaret M HIGGINS | 99 |
A Motor Caravan Rolls Across Sahara and Jungle Through Realms | 327 |
Boyhood Recollections and Recent Observations by An American | 419 |
Copyright | |
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