Smithsonian Report, 1Q42.— Stetson 



Plate 2 



.1 4MB ^ 



F Region 



o 5 V. 



- 0. o 



* O J 



o 



I 4 ♦ 



E Layer or Kennelly Heoviside Loyer 

 JOO Km 



I h 



y a: 

 ' > I- 



ISO M«- 



100 Mi- 



50 Mi- 



Bas&Kit l_».\/er 



• pilot Balloon oOMi- 



ZZ Km "ETxploi-fcr II 1935 

 Sttvti-ia o..a Awjerso" 



HiQhesI PeoJ^ 88A0 m 



SIAL 



.v[ts 



Cross Section of Earths atmosphere. 



