N«w London 



SURFACE ISOTHERMS •€ 



Philodtlphio 

 Wl Imkiglon 

 BoMimor* 



Baoufort 



lOOtiBi ' - -^ 



40^ 



35* 



— SO* 



J Ld 



ZS'W 



80*W 



ro»w 



Figure 8. — Monthly surface isotherm chart, November 18. 19, 22. 24. 25. 1969. 



14 



