Chapin, M. K. Why Men Can Fly.
New York Reynal & Hitchcock Stated Fourth Printing Hard Cover
Illustrated by Alice M. Hean, CR 1943, 338 pages with index. Stated fourth printing on title page, Of all the flying creatures on earth, man is the only one that flies because he thinks. He flies on the wing of thought, he has been given the knowledge about material substances, like, air, fuels, metals and heat, combustion, weight and motion, and the ability to piece together the secret of flight. Green covers, front cover decorated with a bird in flight in gilt. All good+ condition.