79 



APRIL J.I TO MAY 6, 11X8. 



GENERAU CHART 



ICE°PAfROL 

 GRAND BANKS 



ISOTHERMS BASED ON II7S 

 TeMPERATURE REPORTS. 



Figure 26.— Surface temperatures April 21 to May 6, 1928 



MAY t-2l, 1128, 



OENEPAl. C{<ART 

 ICE°PATROL 

 GRAND BANKS 



FiGUP.E 27.— Surface temperatures May 6 to 21, 192S 



