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도서 If the bird wished to descend, the wings were for a moment collapsed; and then when...에 대해 검색한 50개 도서 중 1 - 10
" 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.... "
The Polar and Tropical Worlds: A Description of Man and Nature in the Polar ... - 694 페이지
저자: Georg Hartwig - 1872 - 761 페이지
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Journal of Researches Into the Natural History and Geology of the Countries ...

Charles Darwin - 1846 - 336 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...
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Natural history. Birds

Philip Henry Gosse - 1849
...blue sky. The head and neck were moved frequently, and apparently with force; and it appeared as if the extended wings formed the fulcrum on which 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...
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The Mechanics' Magazine, 59권

1853
...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...
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Iron: An Illustrated Weekly Journal for Iron and Steel Manufacturers ..., 59권

Sholto Percy - 1853
...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»;...
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The Illustrated Natural History: Reptiles, fishes, molluscs, etc

John George Wood - 1862
...blue sky. The head and neck were moved frequently, and apparently with force, and it appeared as if the extended wings formed the fulcrum on which the...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...
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The Illustrated Natural History: Birds

John George Wood - 1862
...blue sky. The head and neck were moved frequently, and apparently with force, and it appeared as if the extended wings formed the fulcrum on which the...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...
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The illustrated natural history, 2권

John George Wood - 1862
...blue sky. The head and neck were moved frequently, and apparently with force, and it appeared as if the extended wings formed the fulcrum on which the...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...
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The Illustrated Natural History, 1권

John George Wood - 1864
...wings formed the fulcrum on which the movements of the neck, body, and tail acted. If the bird wjshed to descend, the wings were for a moment collapsed,...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...
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Annual Report of the Aëronautical Society of Great Britain, 18권

Royal Aeronautical Society - 1883
...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...
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Harper's Magazine, 43권

Thomas Bucklin Wells - 1871
...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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