The Flight of Birds
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In our eReader you can find the full English version of the book. Read The Flight of Birds Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Flight of Birds
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Therefore, since we see a Bird in flight always with Its belly level — a position that it maintains without any «ffort — it follows that its centre of gravity is situated in the lower part of the breast and belly.
Next, since a Bird — in itself heavier than the air — is ■sustained by the force of its wings and falls not, and since its body is suspended from the points of attach- The Flight of Birds 9 ment of the wings in its upper part; therefore it is necessary that the centre of gravity shoul...d be below the roots of the wings in the lower part of the breast, and in a straight line perpendicular to the horizon and to the body of the Bird.
This statement is confirmed by the usual method whereby the centre of gravity of irregular bodies is ascertained. For if we place the body of a Bird plucked of its feathers, in various positions on the horizontal edge of a knife, we shall find that point where the Bird is balanced in equilibrium, that is the centre of gravity, in the straight line drawn from the articulations, or roots of the wings, to the middle-point of the pectoral bone, perpendicularly to the length of the Bird's body; in this precise position Birds rest when asleep on the twigs of trees.
What to read after The Flight of Birds?
You can find similar books in the "Read Also" column, or choose other free books by Hubbard, Thomas O'brien, 1882- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Therefore, since we see a Bird in flight always with Its belly level — a position that it maintains without any «ffort — it follows that its centre of gravity is situated in the lower part of the breast and belly.
Next, since a Bird — in itself heavier than the air — is ■sustained by the force of its wings and falls not, and since its body is suspended from the points of attach- The Flight of Birds 9 ment of the wings in its upper part; therefore it is necessary that the centre of gravity shoul...d be below the roots of the wings in the lower part of the breast, and in a straight line perpendicular to the horizon and to the body of the Bird.
This statement is confirmed by the usual method whereby the centre of gravity of irregular bodies is ascertained. For if we place the body of a Bird plucked of its feathers, in various positions on the horizontal edge of a knife, we shall find that point where the Bird is balanced in equilibrium, that is the centre of gravity, in the straight line drawn from the articulations, or roots of the wings, to the middle-point of the pectoral bone, perpendicularly to the length of the Bird's body; in this precise position Birds rest when asleep on the twigs of trees.
What to read after The Flight of Birds?
You can find similar books in the "Read Also" column, or choose other free books by Hubbard, Thomas O'brien, 1882- to read onlineMoreLess
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