 | Henry Mills Alden, Frederick Lewis Allen, Lee Foster Hartman, Thomas Bucklin Wells - 1871 - 968 페이지
...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... | |
 | Charles Darwin - 1879 - 254 페이지
...and tail acted. If the bird wished to descend, URUGUAY. the Avings 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. It is truly wonderful and beautiful to see... | |
 | Arthur Nicols - 1883 - 436 페이지
...llie movements of a soaring bird. "Near Lima," says Darwin, " I watched several condors for nearly an hour without once taking off my eyes. They moved...with the even and steady movement of a paper kite." Scarcely any birds, perhaps, afford a better example of the sailing or soaring flight than the various... | |
 | Sir Norman Lockyer - 1883 - 680 페이지
...and when again expanded wilh »n altered inclination, the momentum gained by the rapid descent jeemed to urge the bird upwards 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... | |
 | Charles Darwin - 1889 - 628 페이지
...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...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... | |
 | 1891 - 604 페이지
...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...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... | |
 | 1894 - 642 페이지
...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...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... | |
 | 1894 - 1214 페이지
...when again expanded with an altered inclination the momentum gained by the rapid descent, K*infc<l to urge the bird upwards, with the even and steady movement of a paper kite la the case of any bird souring, its motion must be sufficiently rapid so that the action of the inclined... | |
 | Charles Darwin - 1896 - 542 페이지
...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...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... | |
 | Frederick William Lanchester - 1908 - 462 페이지
...on which the movements of the neck, body, and tail acted. If the bird wished to descend, the wings for a moment collapsed ; and then when again expanded...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... | |
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If the bird wished to descend, the wings were for a moment collapsed; and then 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.... 
