Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 стор. |
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Сторінка 72
... pinion , as I shall show presently , being essentially a spiral organ . The twisting of the pectoral fins is well seen in the com- mon perch ( Perca fluviatilis ) , and still better in the 15 - spined Stickleback ( Gasterosteus spinosus ) ...
... pinion , as I shall show presently , being essentially a spiral organ . The twisting of the pectoral fins is well seen in the com- mon perch ( Perca fluviatilis ) , and still better in the 15 - spined Stickleback ( Gasterosteus spinosus ) ...
Сторінка 94
... pinion being reversed for this purpose . The object now is not to depress but to elevate the body . Those movements are facilitated by the alternate play of the feet . ( Compare fig . 47 with fig . 37 , p . 76. ) of the former , while ...
... pinion being reversed for this purpose . The object now is not to depress but to elevate the body . Those movements are facilitated by the alternate play of the feet . ( Compare fig . 47 with fig . 37 , p . 76. ) of the former , while ...
Сторінка 96
... pinion , as in the walrus , sea - bear , and turtle . The feet , which are moved with less vigour , are , on the contrary , rotated or tilted to a very slight extent , the increase and diminution of surface being secured by the opening ...
... pinion , as in the walrus , sea - bear , and turtle . The feet , which are moved with less vigour , are , on the contrary , rotated or tilted to a very slight extent , the increase and diminution of surface being secured by the opening ...
Сторінка 103
... pinion ( aided by the inertia of the trunk ) representing the power , and the air the fulcrum . necessary degree of resistance and non - resistance . Although PROGRESSION IN OR THROUGH THE The wing a lever of the third order,
... pinion ( aided by the inertia of the trunk ) representing the power , and the air the fulcrum . necessary degree of resistance and non - resistance . Although PROGRESSION IN OR THROUGH THE The wing a lever of the third order,
Сторінка 104
... pinion , or that end of the lever directed towards the body , is succeeded by an immense sweep of the extremity of the wing , where its elevat- ing and propelling power is greatest . This arrangement in- sures that the large quantity of ...
... pinion , or that end of the lever directed towards the body , is succeeded by an immense sweep of the extremity of the wing , where its elevat- ing and propelling power is greatest . This arrangement in- sures that the large quantity of ...
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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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