N*«r London 



SURFACE ISOTHERMS •€ 



Philodclphia 

 Wilmington 



40*N 



Baaufort 

 Sovonnoh 



3S' 



30* 



eo*w 75* ro*w 



Fifiure 14. — Monthly surfaoi- isotlirrm ihart. May 15. 18. 19. 27. 28 - June 2. 1970. 



25*N 



20 



