aid of two simple diagrams. produced by gravity) towards the westward point, upon instances of such results could be adduced, if deemed neces- Referring to the diagram A, and taking, as an example of sary, but they will occur to the mind of the intelligent reader ; swift flight, one of the largest… … reaching which, he turns his head, and thus comes in contact in making his ascent upon the angle indicated; by four strokes one foot superficial of wing: let it be supposed that one of with the wind, the force of which, pressing against the under per second, should continue to exert his wings at…
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