The Bookshelf for boys and girls: Nature and Outdoor Life (1912)
University Society, New York · New York. : University Society · leaf 41
a valve-likeand an oar-like action upon the air, according,more or less, to the will and purpose of the birdwhether to sail, swoop, stop, go ahead, or whatnot. Moreover, the feathers are so arranged insets, one set to each joint of the wing, as to foldand overlie with remarkable smoothness. In… … A BARN-SWALLOW IN FLIGHT.Showing the use of the wings and the tail in swooping. birds than ships of the air —even when westretch ships to mean submarines. That the tail of a bird serves mostly as a rud-der and a brake is evident when we watch a spar-
Children's literature · Children's encyclopedias and dictionaries · Literature · Encyclopedias and dictionaries
Internet Archive · BYU–Idaho · Public Domain Mark 1.0. Free to use for anything.
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial372dodg-323-354.webp)
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial4821dodg-712-871.webp)
