Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 páginas |
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Página viii
... primary , secondary , and tertiary feathers , etc. , 180 • Flexion of the wing necessary to the flight of birds , The wing of the bird not always opened up to the same extent in the up stroke , 182 183 Consideration of the forces which ...
... primary , secondary , and tertiary feathers , etc. , 180 • Flexion of the wing necessary to the flight of birds , The wing of the bird not always opened up to the same extent in the up stroke , 182 183 Consideration of the forces which ...
Página 112
... primary feathers and fix them in an ordinary cork , as represented at fig . 55 , and allow the apparatus to drop from a height , I find the cork does not fall vertically downwards , but downwards and forwards in a curve . This follows ...
... primary feathers and fix them in an ordinary cork , as represented at fig . 55 , and allow the apparatus to drop from a height , I find the cork does not fall vertically downwards , but downwards and forwards in a curve . This follows ...
Página 126
... primary and secondary feathers overlap and support each other during extension , and how the anterior or thick margins of the wings are directed upwards and forwards , and the posterior or thin ones downwards and backwards . The wings ...
... primary and secondary feathers overlap and support each other during extension , and how the anterior or thick margins of the wings are directed upwards and forwards , and the posterior or thin ones downwards and backwards . The wings ...
Página 130
... primary ones of either pinion in the long axis of the wing . Flight in no wise impaired . The bird , in this instance , flew upwards of 30 yards , and , having risen a con- siderable height , dropped into a neighbouring tree . Exp . 24 ...
... primary ones of either pinion in the long axis of the wing . Flight in no wise impaired . The bird , in this instance , flew upwards of 30 yards , and , having risen a con- siderable height , dropped into a neighbouring tree . Exp . 24 ...
Página 131
... primary feathers from either wing transversely , i.e. in the direction of the short axis of the wing . Flight very slightly , if at all , impaired when only one wing was operated upon . When both were cut , the bird flew heavily , and ...
... primary feathers from either wing transversely , i.e. in the direction of the short axis of the wing . Flight very slightly , if at all , impaired when only one wing was operated upon . When both were cut , the bird flew heavily , and ...
Outras edições - Ver tudo
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1873 |
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1883 |
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Pré-visualização indisponível - 2016 |
Palavras e frases frequentes
action aërial animals arms and legs arrangement artificial wave artificial wing ascends axes backwards bat and bird beetle biting surface blades body bones Borelli Compare with fig concave convex coracoid Crown 8vo depressed described downward dugong elastic ligaments elbow-joint elevating and propelling ellipse elytra extension extremities feet fins fish flexed flexible flexion flight flying foot gannet horizontal direction humerus inclined planes increased insect insect wing joint kite less lever limbs long axis manner Marey membranous motion move movements muscles muscular natural wing nervures oblique oscillate pectoral fins pinion porpoise portions position posterior margin posterior or thin primary produced quadruped rapid reciprocating Red-legged Partridge remarkable resistance root rotating scapula screw secondary feathers shoulder-joint side spiral swimming tail thick margin tion trunk twisting universal joint upward direction upwards and forwards velocity vertical vertical direction vibrate walking wave wing waved track weight wing descends
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