SURFACE ISOTHERMS 'C 



Phllodtlphlo 

 Wilmington 

 Battlmor* 



C*t 



Charleston 

 B«aufort 

 Savannah 



lOOfm 



• 40^ 



35* 



30* 



J Ld 



ZS'W 



sew 



Figurf 9. — MonlhU siirfaoe i§otheriii chart. Det-rniher 16—18. 29—31. 1969. 



15 



