Animal Locomotion: Or Walking, Swimming, and Flying, with a Dissertation on AeronauticsD. Appleton, 1882 - 264 páginas |
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Página 12
... oscillate , is thrown into double or figure - of - 8 curves , like the body of the fish . When , moreover , the wing ascends and descends to make the up and down strokes , it rotates within the facettes or depressions situated on the ...
... oscillate , is thrown into double or figure - of - 8 curves , like the body of the fish . When , moreover , the wing ascends and descends to make the up and down strokes , it rotates within the facettes or depressions situated on the ...
Página 15
... oscillate . That they have a reciprocating action , and reverse their planes more or less completely at every stroke . That the wing describes a figure - of - 8 track in space when the flying animal is artificially fixed . That the wing ...
... oscillate . That they have a reciprocating action , and reverse their planes more or less completely at every stroke . That the wing describes a figure - of - 8 track in space when the flying animal is artificially fixed . That the wing ...
Página 49
... oscillate naturally , and that under these circumstances the arms , if allowed to swing about , retard rather than increase the speed . The centre of gravity is well forward in the ostrich , and is regulated by the movements of the head ...
... oscillate naturally , and that under these circumstances the arms , if allowed to swing about , retard rather than increase the speed . The centre of gravity is well forward in the ostrich , and is regulated by the movements of the head ...
Página 53
... oscillate in opposite directions , and alternate and keep time with the legs , which oscillate in a similar manner . The arms are arti- culated at the shoulders by ball - and - socket joints to cup - shaped depressions ( glenoid ...
... oscillate in opposite directions , and alternate and keep time with the legs , which oscillate in a similar manner . The arms are arti- culated at the shoulders by ball - and - socket joints to cup - shaped depressions ( glenoid ...
Página 56
... oscillate exactly resembles a pendulum , —a fact first ascertained by the brothers Weber . The advantage accruing from this arrangement , as far as muscular energy is concerned , is very great , the muscles doing comparatively little ...
... oscillate exactly resembles a pendulum , —a fact first ascertained by the brothers Weber . The advantage accruing from this arrangement , as far as muscular energy is concerned , is very great , the muscles doing comparatively little ...
Outras edições - Ver tudo
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1885 |
Animal Locomotion, Or, Walking, Swimming, and Flying: With a Dissertation on ... James Bell Pettigrew Visualização integral - 1874 |
Animal Locomotion: Or, Walking, Swimming and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1893 |
Palavras e frases frequentes
action aërial animals arrangement artificial wave wing artificial wing ascends ball-and-socket joint bat and bird biped blades body bones Borelli Compare with fig concave dead points depressed described downward dugong elastic bands elastic ligaments elbow-joint elevating and propelling elytra extended feathers feet fish flexed flexion flight flying foot force fore gannet gliding gravity hind horizontal direction humerus inclined planes increased insect insect wing kite less lever limbs locomotion long axis machine manner Marey motion move movements muscles muscular muscular system natural wing oblique oscillate ostrich pectoral fins pinion piston porpoise portions position posterior margin posterior or thin produced quadruped rapidity remarkable resistance reverse rigid root rotation sail screw shoulder-joint side Sir George Cayley speed spiral superior band swimming tail thick margin tion trunk universal joint upward direction upwards and forwards velocity vertical vibrate walking waved track wedge weight wing descends