Philadelphia 

 Wilmington 

 Boltlmor* 



SURFACE ISOTHERMS 'C 



40*N 



Cha 



Baoufort 

 Savannah 



35* 



30* 



25°W 



eo'w 



TO'W 



Fif^ire 10. — Monthly surface isolliiTiii cliarl. Jaiuiar> 20-23. 26-28. 1970. 



16 



