The Bookshelf for boys and girls: Nature and Outdoor Life (1912)
University Society, New York · New York. : University Society · leaf 39
tail for resisting, that is, floating on, the air, as seen in the central figure; then in the figure at the left, the th*in, air-cutting edge of a bird as seen from front or rear. HOW A BIRD FLIES Though there are many internal peculiarities, asof lungs and of bones, by which birds are adaptedto… … FIG. I. A SPARROW S WING SHOWING THE DIFFERENTSETS OF FEATHERS. flight explain itself? In other words, what canlive birds teach us human beings of flight? The general form of the bird is naturally thefirst thing of which we think. We easily noticethat in wings and tail it is kite-like; in body…
Children's literature · Children's encyclopedias and dictionaries · Literature · Encyclopedias and dictionaries
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