60* 



65' 



T — rr 



70* 



DEGREES FAHRENHEIT 

 I I I 



1 r 



a. 



UJ 



o 

 50 



100 — 



150 



200 



250 



/ 

 / 



/ ' 



/ / 



/ 



/ 



I I 



-h 



/I 

 / 



/ \ 



I i 



k 



I 



// 



/ 

 / 



/ 



D 18 SEPTEMBER 1949 



D 28 SEPTEMBER 1949 



D 8 OCTOBER 1949 



J L 



FIGURE I 



