 | Perry Fairfax Nursey - Industrial arts - 1853 - 516 pages
...birds flap its wings : " if the bird wished to descend, the wings were for a moment collapsed, and then again expanded with an altered inclination, the momentum...with the even and steady movement of a paper kite." Any person may observe the latter phenomenon in the flight of the common gull. I have myself seen the»;... | |
 | Industrial arts - 1853 - 564 pages
...birds flap its wings : " if the bird wished to descend, the wings were for a moment collapsed, and then again expanded with an altered inclination, the momentum...with the even and steady movement of a paper kite." Any person may observe the latter phenomenon in the flight of the common gull. I have myself seen them... | |
 | John George Wood - Historia natural - 1862 - 804 pages
...which the movements of the neck, body, and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then when again expanded...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 - Historia natural - 1862 - 804 pages
...which the movements of the neck, body, and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then when again expanded...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 pages
...which the movements of the neck, body, and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then when again expanded...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 - Vertebrates - 1831 - 802 pages
...which the movements of the neck, body, and tail acted. If the bird wjshed to descend, the wings were for a moment collapsed, and then when again expanded...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 - Aeronautics - 1883 - 488 pages
...neck, 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...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 - Antarctic regions - 1871 - 776 pages
...which the movements of the neck, body, and tail acted. If the bird wished to descend, the wings were for a moment collapsed, and then, when again expanded...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 pages
...neck, 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...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 pages
...neck, 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...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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... the fulcrum on which the movements of the neck, body, and tail acted. If the bird wished to descend, the wings... 
