Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsD. Appleton, 1885 - 264 páginas |
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Página 9
... sail about for a whole hour without once 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 ...
... sail about for a whole hour without once 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 ...
Página 11
... sail ; and a sword - fish ( such is the momentum acquired by it ) has been known to thrust its tusk through the copper sheathing of a vessel , a layer of felt , four inches of deal , and fourteen inches of oaken plank.1 The wing of the ...
... sail ; and a sword - fish ( such is the momentum acquired by it ) has been known to thrust its tusk through the copper sheathing of a vessel , a layer of felt , four inches of deal , and fourteen inches of oaken plank.1 The wing of the ...
Página 13
... sailing flight of the albatross , and by the fact that some insects can fly when two - thirds of their wing area have been removed . ( This ex- periment is detailed further on . ) These observations are calculated to show the grave ...
... sailing flight of the albatross , and by the fact that some insects can fly when two - thirds of their wing area have been removed . ( This ex- periment is detailed further on . ) These observations are calculated to show the grave ...
Página 100
... sailing flight . The flight of the flying - fish is to be regarded rather as an example of the latter than the former , the fish transferring the velocity acquired by the vigorous lashing of its tail in the water to the air , -an ...
... sailing flight . The flight of the flying - fish is to be regarded rather as an example of the latter than the former , the fish transferring the velocity acquired by the vigorous lashing of its tail in the water to the air , -an ...
Página 104
... sails about with apparent un- concern for hours together , and rarely deigns to flap its enor- mous pinions , which stream from its body like ribbons to the extent , in some cascs , of seven feet on either side . The manner in which the ...
... sails about with apparent un- concern for hours together , and rarely deigns to flap its enor- mous pinions , which stream from its body like ribbons to the extent , in some cascs , of seven feet on either side . The manner in which 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