Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 páginas |
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Página viii
... elevated and depressed must move for- wards , • The wing ascends when the body descends , and vice versâ , The wing acts upon yielding fulcra , 154 156 159 165 The wing acts as a true kite both during the down and up strokes , 165 ...
... elevated and depressed must move for- wards , • The wing ascends when the body descends , and vice versâ , The wing acts upon yielding fulcra , 154 156 159 165 The wing acts as a true kite both during the down and up strokes , 165 ...
Página 12
... elevated in an upward and forward curve . The curves made by the wing and body in flight form , when united , waved lines , which intersect each other at every beat of the wing . The wing and the body act upon each other alternately ...
... elevated in an upward and forward curve . The curves made by the wing and body in flight form , when united , waved lines , which intersect each other at every beat of the wing . The wing and the body act upon each other alternately ...
Página 25
... elevated or depressed . If the hand repre- sented a travelling surface which operated on the earth , the water , or the air , it is not difficult to understand how , when it was made to move by the action of the muscles of the arm , it ...
... elevated or depressed . If the hand repre- sented a travelling surface which operated on the earth , the water , or the air , it is not difficult to understand how , when it was made to move by the action of the muscles of the arm , it ...
Página 49
... elevated , it swings forward pendulum- fashion , and describes a curve whose convexity is directed towards the right side . When the left leg is flexed and elevated , it swings forward and describes a curve whose con- vexity is directed ...
... elevated , it swings forward pendulum- fashion , and describes a curve whose convexity is directed towards the right side . When the left leg is flexed and elevated , it swings forward and describes a curve whose con- vexity is directed ...
Página 50
... elevated , and advanced , it in like manner rotates upon the trunk , sup- ported in this instance by the extended right leg . The leg which is on the ground for the time being supplies the neces- sary lever , the ground the fulcrum ...
... elevated , and advanced , it in like manner rotates upon the trunk , sup- ported in this instance by the extended right leg . The leg which is on the ground for the time being supplies the neces- sary lever , the ground the fulcrum ...
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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