Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 páginas |
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Página 67
... causing the body of the fish to move in the line de f . The explanation is apparently a satisfactory one ; but a careful analysis of the swimming of the living fish induces me to believe it is incorrect . According to this , the ...
... causing the body of the fish to move in the line de f . The explanation is apparently a satisfactory one ; but a careful analysis of the swimming of the living fish induces me to believe it is incorrect . According to this , the ...
Página 72
... causing its anterior and posterior portions to assume opposite curves . The pectoral and other fins are also thrown into curves when in action , the movement , as in the body itself , travelling in spiral waves ; and it is worthy of ...
... causing its anterior and posterior portions to assume opposite curves . The pectoral and other fins are also thrown into curves when in action , the movement , as in the body itself , travelling in spiral waves ; and it is worthy of ...
Página 80
... causing his hands to work like sculls , so as to make figure - of - 8 loops in the water . This motion greatly resembles that made by the swimming wings of the penguin . It is most effective when the hands are turned slightly upwards ...
... causing his hands to work like sculls , so as to make figure - of - 8 loops in the water . This motion greatly resembles that made by the swimming wings of the penguin . It is most effective when the hands are turned slightly upwards ...
Página 91
... causing the feathers to roll down , and giving to the back of the wing , which in this case communi- cates the more effective stroke , the angle or obliquity neces- sary for sending the animal forward . This angle , I may observe ...
... causing the feathers to roll down , and giving to the back of the wing , which in this case communi- cates the more effective stroke , the angle or obliquity neces- sary for sending the animal forward . This angle , I may observe ...
Página 95
... causing the mass of the bird to pursue a more or less horizontal course . I offer this explanation of the action of the wing in and out of the water after repeated and careful observation in tame and wild birds , and , as I am aware ...
... causing the mass of the bird to pursue a more or less horizontal course . I offer this explanation of the action of the wing in and out of the water after repeated and careful observation in tame and wild birds , and , as I am aware ...
Otras ediciones - Ver todas
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Sin vista previa disponible - 2016 |
Términos y frases comunes
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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