Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 páginas |
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Página 66
... vibrate on either side of a given line , very much as a rudder may be made to oscillate by moving its tiller . The line referred to corresponds to the axis of the fish when it is at rest and when its body is straight , and to the path ...
... vibrate on either side of a given line , very much as a rudder may be made to oscillate by moving its tiller . The line referred to corresponds to the axis of the fish when it is at rest and when its body is straight , and to the path ...
Página 71
... vibrate . The remarks now made of the tail and the water are equally apropos of the wing and the air . The tail and the wing act on a common principle . A certain analogy may therefore be traced be- tween the water and air as media ...
... vibrate . The remarks now made of the tail and the water are equally apropos of the wing and the air . The tail and the wing act on a common principle . A certain analogy may therefore be traced be- tween the water and air as media ...
Página 102
... and bird are made to vibrate with lightning rapidity , discoursing , as they do so , a soft and stirring music very delightful to the lover of nature . PROGRESSION IN OR THROUGH THE AIR . THE atmosphere , 102 ANIMAL LOCOMOTION .
... and bird are made to vibrate with lightning rapidity , discoursing , as they do so , a soft and stirring music very delightful to the lover of nature . PROGRESSION IN OR THROUGH THE AIR . THE atmosphere , 102 ANIMAL LOCOMOTION .
Página 106
... vibrate , are represented at fig . 53 . The rotation of the wing on its long axis as it ascends and descends causes the under surface of the wing to act as a kite , both during the up and down strokes , provided always the body bearing ...
... vibrate , are represented at fig . 53 . The rotation of the wing on its long axis as it ascends and descends causes the under surface of the wing to act as a kite , both during the up and down strokes , provided always the body bearing ...
Página 107
... vibrate in a more or less vertical direction . The action of the wing is readily imitated , as a reference to fig . 53 will show . 9 4 n h d m FIG . 53 . If , for example , I take a tapering elastic reed , as represented at a b , and ...
... vibrate in a more or less vertical direction . The action of the wing is readily imitated , as a reference to fig . 53 will show . 9 4 n h d m FIG . 53 . If , for example , I take a tapering elastic reed , as represented at a b , and ...
Outras edições - Ver tudo
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1873 |
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1883 |
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Pré-visualização indisponível - 2016 |
Palavras e frases frequentes
action aërial animals arms and legs arrangement artificial wave artificial wing ascends axes backwards bat and bird beetle biting surface blades body bones Borelli Compare with fig concave convex coracoid Crown 8vo depressed described downward dugong elastic ligaments elbow-joint elevating and propelling ellipse elytra extension extremities feet fins fish flexed flexible flexion flight flying foot gannet horizontal direction humerus inclined planes increased insect insect wing joint kite less lever limbs long axis manner Marey membranous motion move movements muscles muscular natural wing nervures oblique oscillate pectoral fins pinion porpoise portions position posterior margin posterior or thin primary produced quadruped rapid reciprocating Red-legged Partridge remarkable resistance root rotating scapula screw secondary feathers shoulder-joint side spiral swimming tail thick margin tion trunk twisting universal joint upward direction upwards and forwards velocity vertical vertical direction vibrate walking wave wing waved track weight wing descends
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