Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on AëronauticsH. S. King & Company, 1873 - 264 páginas |
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Página 65
... pectoral ( a ) , fins , which are principally engaged in swimming . The extent of the travelling sur- faces required for water greatly exceed those required for land . Compare the tail and fins of the present figure with the feet of the ...
... pectoral ( a ) , fins , which are principally engaged in swimming . The extent of the travelling sur- faces required for water greatly exceed those required for land . Compare the tail and fins of the present figure with the feet of the ...
Página 72
... 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 remark that the wing of the insect , bat , and bird obeys similar impulses ...
... 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 remark that the wing of the insect , bat , and bird obeys similar impulses ...
Página 73
... pectoral fins of fishes . Compare with fig . 30 , p . 65. - Original . FIG . 34. - The Manatee ( Manatus Americanus ) . In this the anterior extremities are more developed than in the porpoise , but still the tail is the great organ of ...
... pectoral fins of fishes . Compare with fig . 30 , p . 65. - Original . FIG . 34. - The Manatee ( Manatus Americanus ) . In this the anterior extremities are more developed than in the porpoise , but still the tail is the great organ of ...
Página 77
... pectoral fins of fishes . It may be remarked that the twisting or spiral move- ments of the anterior extremities are calculated to utilize the water to the utmost - the gradual but rapid operation of the helix enabling the animal to lay ...
... pectoral fins of fishes . It may be remarked that the twisting or spiral move- ments of the anterior extremities are calculated to utilize the water to the utmost - the gradual but rapid operation of the helix enabling the animal to lay ...
Página 90
... pectoral fins . Flight under water , etc.-Mr. Macgillivray thus describes a flock of red mergansers which he observed pursuing sand - eels in one of the shallow sandy bays of the Outer Hebrides : — " The birds seemed to move under the ...
... pectoral fins . Flight under water , etc.-Mr. Macgillivray thus describes a flock of red mergansers which he observed pursuing sand - eels in one of the shallow sandy bays of the Outer Hebrides : — " The birds seemed to move under the ...
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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