AIRCRAFT PROPULSION — TAYLOR 293 



the following prophecy of Lester D. Gardner in Aviation, volume 1, 

 No. 1, August 1916, will be as meaningful now as it was then : 



Now many of the most distinguished scientists in all countries are giving aero- 

 nautics close and careful study. From the work of these men aeronautics will 

 derive the information upon which progress, such as has never been thought pos- 

 sible, will be achieved. 



Editok's Note. — The full bibliography that accompanied the manuscript of 

 this article was too lengthy for inclusion here, but if possible it will be arranged 

 to publish it elsewhere. 



