Animal Locomotion: Or Walking, Swimming, and Flying, with a Dissertation on AeronauticsD. Appleton, 1882 - 264 páginas |
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Página xvi
... downwards , the fish ( if it be not speci- ally provided with a swimming bladder ) sinks , and the bird gravitates of necessity . There is a sudden subsiding and ces- sation of motion in either case , but the quadruped and fish have no ...
... downwards , the fish ( if it be not speci- ally provided with a swimming bladder ) sinks , and the bird gravitates of necessity . There is a sudden subsiding and ces- sation of motion in either case , but the quadruped and fish have no ...
Página 9
... downwards ) presses upon the inclined . planes or kites formed by the wings in such a manner as to become converted directly into a propelling , and indirectly into a buoying or supporting power . This can be proved by experiment , as I ...
... downwards ) presses upon the inclined . planes or kites formed by the wings in such a manner as to become converted directly into a propelling , and indirectly into a buoying or supporting power . This can be proved by experiment , as I ...
Página 12
... downward and forward curve , and elevates the body in an upward and forward curve . When the body descends , it describes a downward and forward curve , the wing being elevated in an upward and forward curve . The curves made by the ...
... downward and forward curve , and elevates the body in an upward and forward curve . When the body descends , it describes a downward and forward curve , the wing being elevated in an upward and forward curve . The curves made by the ...
Página 33
... downwards or vertically , instead of from side to side . The spinal column is jointed as in the fish , with this difference , that the vertebræ ( especially towards the tail ) form the rounded prominences or ball , the meniscus or cup ...
... downwards or vertically , instead of from side to side . The spinal column is jointed as in the fish , with this difference , that the vertebræ ( especially towards the tail ) form the rounded prominences or ball , the meniscus or cup ...
Página 74
... downwards , as in the foregoing mammals , but in swimming it is made to FIG . 35. - Skeleton of the Dugong . In this curious mammal the anterior extremities are more developed than in the manatee and porpoise , and resemble those found ...
... downwards , as in the foregoing mammals , but in swimming it is made to FIG . 35. - Skeleton of the Dugong . In this curious mammal the anterior extremities are more developed than in the manatee and porpoise , and resemble those found ...
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