Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsD. Appleton, 1885 - 264 páginas |
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Página 9
... flapping his pinions . This can only be done in virtue of the weight of the bird acting upon the inclined planes or kites formed by the wings as stated . 1 The weight of the body plays an important part in walking and swimming , as well ...
... flapping his pinions . This can only be done in virtue of the weight of the bird acting upon the inclined planes or kites formed by the wings as stated . 1 The weight of the body plays an important part in walking and swimming , as well ...
Página 73
... - 1 Vile " Remarks on the Swimming of the Cetaceans , " by Dr. Murie , Proc . Zool . Soc . , 1865 , pp . 209 , 210 . pally concerned in progression , these flapping about in the. PROGRESSION ON AND IN THE WATER . 73 1333.
... - 1 Vile " Remarks on the Swimming of the Cetaceans , " by Dr. Murie , Proc . Zool . Soc . , 1865 , pp . 209 , 210 . pally concerned in progression , these flapping about in the. PROGRESSION ON AND IN THE WATER . 73 1333.
Página 74
... flapping about in the water very much as the wings of a bird flap about in the air . In the beaver , the tail is flattened from above downwards , as in the foregoing mammals , but in swimming it is made to Fia . 85. - Skeleton of the ...
... flapping about in the water very much as the wings of a bird flap about in the air . In the beaver , the tail is flattened from above downwards , as in the foregoing mammals , but in swimming it is made to Fia . 85. - Skeleton of the ...
Página 100
... flapping may be discontinued ; or it must throw itself from a height , in which case the initial velocity is acquired by the weight of the body acting upon the inclined planes formed by the motionless wings . The flapping and gliding ...
... flapping may be discontinued ; or it must throw itself from a height , in which case the initial velocity is acquired by the weight of the body acting upon the inclined planes formed by the motionless wings . The flapping and gliding ...
Página 101
... flapping or by a motion analogous to the skimming of swallows . He records the important fact , that the flying - fish can change its course after leaving the water , which satisfactorily proves that the fins are not simply passive ...
... flapping or by a motion analogous to the skimming of swallows . He records the important fact , that the flying - fish can change its course after leaving the water , which satisfactorily proves that the fins are not simply passive ...
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Animal Locomotion: Or Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1882 |
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 albatross angle animals arms and legs arrangement artificial wave artificial wing ascends backwards bat and bird biped blades body bones Borelli Compare with fig concave convex 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 horizontal direction humerus inclined planes increased insect insect wing joint kite less levers limbs locomotion long axis manner Marey motion move movements muscles muscular muscular system natural wing nervures oblique oscillate pectoral pectoral fins pinion porpoise portion position posterior margin posterior or thin produced quadruped rapidity remarkable resistance reverse 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 vertical direction vibrate walking waved track weight wing descends