 | Philip Henry Gosse - 1849 - Страниц: 344
...the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in a horizontal plane in that fluid (in which there is so little friction) cannot be great; and this force is all that is wanted.... | |
 | John George Wood - 1862 - Страниц: 804
...the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in a horizontal plane in that fluid (in which there is so little friction) cannot be great, and this force is all that is wanted.... | |
 | John George Wood - 1862 - Страниц: 804
...the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in a horizontal plane in that fluid (in which there is so little friction) cannot be great, and this force is all that is wanted.... | |
 | John George Wood - 1862 - Страниц: 804
...the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in a horizontal plane in that fluid (in which there is so little friction) cannot be great, and this force is all that is wanted.... | |
 | John George Wood - 1831 - Страниц: 802
...the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in a horizontal plane in that fluid (in which there is so little friction) cannot be great, and this force is all that is wanted.... | |
 | Henry Mills Alden, Frederick Lewis Allen, Lee Foster Hartman, Thomas Bucklin Wells - 1871 - Страниц: 980
...the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in...in the air (in which there is so little friction) can not be great, and this force is all that is wanted. The movement of the neck and body of the condor... | |
 | Henry Mills Alden, Frederick Lewis Allen, Lee Foster Hartman, Thomas Bucklin Wells - 1871 - Страниц: 968
...inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep op the momentum of a body moving in a horizontal plane...in the air (in which there is so little friction) can not be great, and this force is nil that is wanted. The movement of the neck and body of the condor... | |
 | James Means - 1894 - Страниц: 224
...the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in...friction) cannot be great, and this force is all that is wanted.2 " The movement of the neck and body of the condor, we must suppose, is sufficient for this.... | |
 | American Engineer and Railroad Journal - 1894 - Страниц: 450
...friction) cannot bo great, and this force is all that Is wanted. Tbe movement of the neck and oodyof the condor we must suppose is sufficient for this. However this may be. it 1s t.uly wonderful and beautiful to see so great a bird, hour after hour, without nuy apparent exertion,... | |
 | 1894 - Страниц: 1214
...action of the inclined surface of its body on the atmosphere may counterbalance its gravity The force 10 keep up the momentum of a body moving in a horizontal plane in that fluid (in which there is so little friction) cannot be great, and this force is all that is wanted.... | |
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In the case of any bird soaring, its motion must be sufficiently rapid, so that the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in a horizontal plane in... 
