Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 стор. |
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Сторінка vii
... margins of the wing , thrown into opposite curves during extension and flexion , 146 The tip of the bat and bird's wing describes an ellipse , 147 The wing capable of change of form in all its parts , 147 The wing during its vibration ...
... margins of the wing , thrown into opposite curves during extension and flexion , 146 The tip of the bat and bird's wing describes an ellipse , 147 The wing capable of change of form in all its parts , 147 The wing during its vibration ...
Сторінка 36
... margin and the extremity of the wing , and may not inaptly be compared to the nervures in corresponding positions in the wing of the beetle . - Original . d n n n a FIG . 17. - The Bat ( Phyllorhina gracilis , Peters ) . Here the ...
... margin and the extremity of the wing , and may not inaptly be compared to the nervures in corresponding positions in the wing of the beetle . - Original . d n n n a FIG . 17. - The Bat ( Phyllorhina gracilis , Peters ) . Here the ...
Сторінка 72
... margins lashed about by spiral movements which closely resemble those by which the wings of insects are propelled.2 The rotating of the fish upon its long axis is seen to advan- tage in the shark and sturgeon , the former of which ...
... margins lashed about by spiral movements which closely resemble those by which the wings of insects are propelled.2 The rotating of the fish upon its long axis is seen to advan- tage in the shark and sturgeon , the former of which ...
Сторінка 76
... margin ; and a thin , flexible , and more or less elastic posterior margin . They are screw structures , and when elevated and depressed in the water , twist and untwist , screw - fashion , precisely as wings do , or the tails of the ...
... margin ; and a thin , flexible , and more or less elastic posterior margin . They are screw structures , and when elevated and depressed in the water , twist and untwist , screw - fashion , precisely as wings do , or the tails of the ...
Сторінка 77
... margins of the flippers are directed downwards , and similar remarks are to be made of the anterior extremities of the walrus , great auk , and turtle.1 The flippers are advanced alternately ; and the twisting , screw - like movement ...
... margins of the flippers are directed downwards , and similar remarks are to be made of the anterior extremities of the walrus , great auk , and turtle.1 The flippers are advanced alternately ; and the twisting , screw - like movement ...
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Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Попередній перегляд недоступний - 2016 |
Загальні терміни та фрази
action aërial albatross angle animals arms and legs arrangement artificial wave artificial wing ascends backwards ball-and-socket joint bat and bird biped blades body bones Borelli Compare with fig concave convex Crown 8vo depressed described downward dugong elastic ligaments elbow-joint elevating and propelling ellipse elytra extended feet fins fish flexed flexible flexion flight flying foot force gannet glide hind horizontal direction humerus inclined planes increased insect wing joint kite less lever limbs locomotion long axis manner Marey motion move movements muscles muscular muscular system natural wing nervures oblique oscillate ostrich pectoral fins pinion porpoise portion position posterior margin posterior or thin produced quadruped rapid remarkable resistance right arm root rotation sail screw sea-bear shoulder-joint side speed spiral swimming tail thick margin tion travelling surfaces trunk twisting universal joint upward direction upwards and forwards velocity vertical vibrate walking waved track weight wing descends
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