Animal Locomotion: Or, Walking, Swimming and Flying, with a Dissertation on AëronauticsD. Appleton, 1893 - 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 truck 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 truck 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 ...
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Palavras e frases frequentes
action aërial albatross angle animal arms and legs arrangement artificial wave artificial wing ascends backwards bat and bird biped blades body bones Borelli Compare with fig concave depressed described downward dugong effective stroke 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 pectoral fins pinion porpoise portion position posterior extremities posterior margin posterior or thin produced quadruped rapidity remarkable resistance reverse right arm root rotation sail screw sea-bear shoulder-joint side speed spiral swimming tail thick margin travelling surfaces trunk twisting universal joint upward direction upwards and forwards velocity vertical vertical direction vibrate walking waved track weight wing descends