Animal Locomotion: Or Walking, Swimming, and Flying, with a Dissertation on AeronauticsD. Appleton, 1882 - 264 páginas |
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Página 134
... gannet and heron . The following de- tails of weight , measurement , etc. , of the gannet were supplied by an adult specimen which I dissected during the winter of 1869. Entire weight , 7 lbs . ( minus 3 ounces ) ; length of body from ...
... gannet and heron . The following de- tails of weight , measurement , etc. , of the gannet were supplied by an adult specimen which I dissected during the winter of 1869. Entire weight , 7 lbs . ( minus 3 ounces ) ; length of body from ...
Página 135
... gannet there is only one foot one square inch of wing for every 2 lbs . 4 ounces of body . The gannet has , consequently , less than half of the wing area of the heron . The gannet's wings are , however , long narrow wings ( those of ...
... gannet there is only one foot one square inch of wing for every 2 lbs . 4 ounces of body . The gannet has , consequently , less than half of the wing area of the heron . The gannet's wings are , however , long narrow wings ( those of ...
Página 169
... gannet throws itself from a cliff , the inertia of the trunk at once comes into play , and relieves the bird from those herculean exertions required to raise it from the water when it is once fairly settled thereon . A swallow dropping ...
... gannet throws itself from a cliff , the inertia of the trunk at once comes into play , and relieves the bird from those herculean exertions required to raise it from the water when it is once fairly settled thereon . A swallow dropping ...
Página 194
... gannets , and unusually elongated in the albatross . In the golden eagle it is also seen to be of great length . " --- Macgillivray's British Birds , vol . i . p . 30 . 176 ) , a form of pinion usually associated with 194 ANIMAL ...
... gannets , and unusually elongated in the albatross . In the golden eagle it is also seen to be of great length . " --- Macgillivray's British Birds , vol . i . p . 30 . 176 ) , a form of pinion usually associated with 194 ANIMAL ...
Página 204
... gannet , precipitate themselves from incredible heights , and drop into the water with the velocity of a meteorite - the momentum which they acquire during their descent materially aiding them in their subaqueous flight . They emerge ...
... gannet , precipitate themselves from incredible heights , and drop into the water with the velocity of a meteorite - the momentum which they acquire during their descent materially aiding them in their subaqueous flight . They emerge ...
Outras edições - Ver tudo
Animal Locomotion: Or, Walking, Swimming, and Flying, with a Dissertation on ... James Bell Pettigrew Visualização integral - 1885 |
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 animals arrangement artificial wave wing artificial wing ascends ball-and-socket joint bat and bird biped blades body bones Borelli Compare with fig concave dead points depressed described downward dugong elastic bands elastic ligaments elbow-joint elevating and propelling elytra extended feathers feet fish flexed flexion flight flying foot force fore gannet gliding gravity hind horizontal direction humerus inclined planes increased insect insect wing kite less lever limbs locomotion long axis machine manner Marey motion move movements muscles muscular muscular system natural wing oblique oscillate ostrich pectoral fins pinion piston porpoise portions position posterior margin posterior or thin produced quadruped rapidity remarkable resistance reverse rigid root rotation sail screw shoulder-joint side Sir George Cayley speed spiral superior band swimming tail thick margin tion trunk universal joint upward direction upwards and forwards velocity vertical vibrate walking waved track wedge weight wing descends