StNicholas [serial] . A TYPICAL BIRD IN FLIGHT. To show the tight overlapping of the flight-feathers, to resist the air, in the downward stroke of the wings. By these arrangements the wing has 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 these respects and in a great many others, 842 NATURE AND SCIENCE FOR YOUNG FOLKS [July, we see that the wings r
StNicholas [serial] . A TYPICAL BIRD IN FLIGHT. To show the tight overlapping of the flight-feathers, to resist the air, in the downward stroke of the wings. By these arrangements the wing has 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 these respects and in a great many others, 842 NATURE AND SCIENCE FOR YOUNG FOLKS [July, we see that the wings resemble oars, rather thansails, for navigating the airy sea. However,fish of the air is a still more scientific title for. A IN 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-
Size: 1485px × 1681px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, bookidstnicholasse, bookyear1873
