 | Philip Henry Gosse - 1849 - 344 Seiten
...and tail acted. If the bird wished to descend, the wings were for a moment collapsed; and then when again expanded with an altered inclination, the momentum...with the even and steady movement of a paper kite. In the case of any bird soaring, its motion must be sufficiently rapid, so that the action of the inclined... | |
 | 1853 - 564 Seiten
...the motion of their wings; the chief use of which, he imagines, is to keep the bird in equilibrinm while it is buoyed up by the inflation of the internal...the flight of the common gull. I have myself seen them describe a curve a hundred yards long, without once flapping their wings ; they do, however, usually... | |
 | John George Wood - 1862 - 804 Seiten
...and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then when again expanded with an altered inclination, the momentum...to urge the bird upwards with the even and steady movements of a paper kite. In case of any bird soaring, its motion must be sufficiently rapid, so that... | |
 | John George Wood - 1862 - 804 Seiten
...and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then when again expanded with an altered inclination, the momentum...to urge the bird upwards with the even and steady movements of a paper kite. In case of any bird soaring, its motion must be sufficiently rapid, so that... | |
 | John George Wood - 1862 - 804 Seiten
...and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then when again expanded with an altered inclination, the momentum...to urge the bird upwards with the even and steady movements of a paper kite. In case of any bird soaring, its motion must be sufficiently rapid, so that... | |
 | John George Wood - 1831 - 802 Seiten
...and tail acted. If the bird wjshed to descend, the wings were for a moment collapsed, and then when again expanded with an altered inclination, the momentum...to urge the bird upwards with the even and steady movements of a paper kite. In case of any bird soaring, its motion must be sufficiently rapid, so that... | |
 | Aeronautical Society of Great Britain - 1883 - 488 Seiten
...body, and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and when again expanded with an altered inclination, the momentum...gained by the rapid descent seemed to urge the bird upward with the even and steady movement of a paper kite. In the case of any bird soaring, its motion... | |
 | Georg Hartwig - 1871 - 776 Seiten
...and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then, when again expanded with an altered inclination, the momentum...with the even and steady movement of a paper kite." According to Humboldt and D'Orbigny, the condor is a contemptible coward, whom the stick of a child... | |
 | Henry Mills Alden, Frederick Lewis Allen, Lee Foster Hartman, Thomas Bucklin Wells - 1871 - 968 Seiten
...body, and tail acted. If the bird wished to descend, the wings were collapsed for a moment, and when again expanded with an altered inclination the momentum...gained by the rapid descent seemed to urge the bird upward with the even and steady movement of a paper kite. In the case of any bird soaring its motion... | |
 | Henry Mills Alden, Frederick Lewis Allen, Lee Foster Hartman, Thomas Bucklin Wells - 1871 - 980 Seiten
...body, and tail acted. If the bird wished to descend, the wings were collapsed for a moment, and when again expanded with an altered inclination the momentum...gained by the rapid descent seemed to urge the bird upward with the even and steady movement of a paper kite. In the case of any bird soaring its motion... | |
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If the bird wished to descend, the wings were for a moment collapsed : and when again expanded with an altered inclination, the momentum gained by the rapid descent seemed to urge the bird upwards with the even and steady movement of a paper kite. 
