Phllodalphlo 

 Wilmington 



SURFACE ISOTHERMS 'C Bottimort 



9 lOOfM , 



.40nt 



C Romoin 

 Charleston 



Booufort 

 Savonnoli .'Sr ^ ' ^J,!f,^,^ 



35* 



30* 



— 25°N 



80»W 



Fi^re 13. — Monthly surface isotherm eharl. April 14—17. 22. 1970. 



19 



