Animal Locomotion: Or, Walking, Swimming and Flying, with a Dissertation on AëronauticsD. Appleton, 1893 - 264 páginas |
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Página 15
... direction of their length , when they are made to oscillate . That they have a reciprocating action , and reverse their planes more or less completely at every stroke . That the wing ... horizontal direction , describes a INTRODUCTION . 15.
... direction of their length , when they are made to oscillate . That they have a reciprocating action , and reverse their planes more or less completely at every stroke . That the wing ... horizontal direction , describes a INTRODUCTION . 15.
Página 16
... horizontal direction , describes a looped and then a waved track , from the fact that the figure of 8 is gradually opened out or unravelled as the animal advances . That the wing acts after the manner of a kite , both during the down ...
... horizontal direction , describes a looped and then a waved track , from the fact that the figure of 8 is gradually opened out or unravelled as the animal advances . That the wing acts after the manner of a kite , both during the down ...
Página 25
... horizontal direction ; the long axes of the sarcous elements of the triceps ( j ) being arranged in a nearly vertical direction . When the fore- arm is extended , the long axes of the sarcous elements of the biceps and triceps are ...
... horizontal direction ; the long axes of the sarcous elements of the triceps ( j ) being arranged in a nearly vertical direction . When the fore- arm is extended , the long axes of the sarcous elements of the biceps and triceps are ...
Página 49
... horizontal direction . The wings , in addition to their elevating and propelling power , contribute by their short , rapid , swinging movements , to con- tinuity of motion in the legs . No bird with large wings can run well . The ...
... horizontal direction . The wings , in addition to their elevating and propelling power , contribute by their short , rapid , swinging movements , to con- tinuity of motion in the legs . No bird with large wings can run well . The ...
Página 77
... horizontal direction , by muscular efforts alone - an observation which may likewise be made regarding a great number of fishes , since the swimming- bladder or float is in many entirely absent.2 Compare with figs . 33 , 34 , 35 , and ...
... horizontal direction , by muscular efforts alone - an observation which may likewise be made regarding a great number of fishes , since the swimming- bladder or float is in many entirely absent.2 Compare with figs . 33 , 34 , 35 , and ...
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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