Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsD. Appleton, 1885 - 264 páginas |
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Página 36
... heavy - bodied short - winged birds . The bones of the arm ( r ) , forearm ( d ) , and hand ( n , n , n ) of the bat ( fig . 17 ) support the anterior or thick margin and the extremity of the wing , and may not inaptly be compared to ...
... heavy - bodied short - winged birds . The bones of the arm ( r ) , forearm ( d ) , and hand ( n , n , n ) of the bat ( fig . 17 ) support the anterior or thick margin and the extremity of the wing , and may not inaptly be compared to ...
Página 76
... thick and comparatively stiff anterior margin ; and a thin , flexible , and more or less elastic posterior margin . They are screw structures , and when elevated and depressed in the water , twist and untwist , screw - fashion ...
... thick and comparatively stiff anterior margin ; and a thin , flexible , and more or less elastic posterior margin . They are screw structures , and when elevated and depressed in the water , twist and untwist , screw - fashion ...
Página 89
... thick anterior margin and a thin . posterior one , and in this respect resemble wings . Compare with figs . 36 and 37 , pp . 74 and 76. - Original . quaint animal move alternately , and tilt or partially rotate during their action , as ...
... thick anterior margin and a thin . posterior one , and in this respect resemble wings . Compare with figs . 36 and 37 , pp . 74 and 76. - Original . quaint animal move alternately , and tilt or partially rotate during their action , as ...
Página 91
... thick margin of the wing when giving the effective stroke is turned downwards , as happens in the flippers of the sea - bear , walrus , and turtle . This , I need scarcely remark , is precisely the reverse of what occurs in the ordinary ...
... thick margin of the wing when giving the effective stroke is turned downwards , as happens in the flippers of the sea - bear , walrus , and turtle . This , I need scarcely remark , is precisely the reverse of what occurs in the ordinary ...
Página 94
... thick margin of the wing is directed downwards and forwards , while the posterior margin is directed upwards and backwards . This has the effect of directing the under or ventral concave surface of the wing upwards and backwards , the ...
... thick margin of the wing is directed downwards and forwards , while the posterior margin is directed upwards and backwards . This has the effect of directing the under or ventral concave surface of the wing upwards and backwards , the ...
Outras edições - Ver tudo
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