OF THE UNITED STATES ARMY. 



145 



Dr. Williams and Sergeant Redman. At the time of the signing of 

 the armistice the Military Intelligence Service was preparing for 

 the extensive use of these balloons for flooding the whole of Ger- 

 many, Austria and even parts of Russia with suitable leaflets, sev- 

 eral hundred of which could have been scattered by a single balloon, 

 the total cost of which would have been but two or three dollars. 



TABLE I. 



War Department, Signal Corps, U. S. Army, Meteorological Service. 



Station EUendale, N. D. (90th Meridian Time.) 



Wind Aloft Report. 



Time 7:00 A.M. Date November 13, 1918. 



4. The Charting of the Upper Air in Aid of Aviation. — In a 

 recent Brisbane editorial the following sentence occurs : " Flying 

 machines of the future going long distances will travel at least 

 32,000 feet up, where no wind blows except the gentle eastern wind 

 causfd by the earth's motion on its axis." It is quite likely that the 

 future aviator will fly high, but his motive will be to find an air 

 current, not to escape one. The gentleness of the zephyrs existing 

 at high altitudes may be seen from tables i, 2, 3, 4 and 5 which record 

 three sets of pilot balloon observations recently taken by the Signal 



PROC. AMER. PHIL. SOC. VOL. LVIII, J, JULY II, I9I9. 



