33 



At this time southwesterly winds began to blow with greater fre- 

 quency and longer duration along the Atlantic seaboard of North 

 America, and the ice regions being in the periphery of this system 

 came under the effects of the southwest air stream more and more. 

 The first real evidences of a hot wave over the United States was 

 perceived the latter part of June. 



^^ 



Fig. 1. — March weather diagram 



WEATHER DIAGRAMS 



In order to secure an intelligent impression of the general weather 

 conditions which prevailed in the ice regions during 1926 we have 

 constructed circular diagrams which include by months the follo^ving 



