William Duane Ennis eBooks

Flying Machines Today. E-book. Formato PDF William Duane Ennis   -  Forgotten Books, 2017  - 

The suggestion that some grasp of the principles and a very fair knowledge of the current practices in aeronautics may be had without special technical knowledge came almost automatically. If this book is comprehensible to the lay reader, and if it conveys to him even a small pro portion of the writer's conviction that ?ying machines are to profoundly in?uence our living in the next generation, it will have accomplished its author's purpose.