Two Ways a Bird Rights Itself in a Gust
Swinging a wing to leeward, or lowering the opposite wing, to avoid overturning
The note sets out two remedies by which a bird keeps a gust from flipping it over, illustrated by two small sketches of gliding birds along the top of the leaf. It can change the windward wing, swinging it at once to leeward, or it can lower the opposite wing so that the wind striking inside it becomes more powerful than the wind on the wing still facing the gust.
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Two remedies against being overturned
To avoid being overturned by the wind, the bird has two remedies. One is to change the wing that was to windward, putting it at once to leeward. The other is to lower the opposite wing so that the wind striking within it becomes more powerful than in the wing that faces the wind.
Two gliding birds
Two small sketches of birds on outstretched wings are drawn across the top of the leaf, one above the other, illustrating the wind-borne flight discussed in the note.