498 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



1929 



1930 

 1931 

 1932 

 1933 

 1934 



1935 

 1936 

 1937 

 1938 

 1939 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 80° N. Long. 60° W. 



950 mb. + 



73.3 62.1 63.7 72.7 72.4 73.7 67.4 68.5 63. 



58.9 

 67.1 

 62.1 

 51.8 

 57.1 



64.2 

 72.5 

 58.4 

 65.7 

 68.2 



58.4 

 64.8 

 62.0 

 69.8 

 59.2 



58.5 

 76.6 

 69.5 

 64.0 



69.4 

 75.6 

 73.8 



72.7 

 61.6 



70.8 

 73.3 

 79.1 

 64.1 



74.9 



76.9 

 74.4 

 73.5 



79.3 

 71.4 

 72.1 

 65.1 

 75.8 



68.9 

 73.7 

 75.3 

 71.9 

 66.8 



74.7 

 68.1 

 67.4 

 72.3 

 70.3 



69.1 

 69.8 

 69.6 

 63.7 

 68.6 



64.8 

 03. 

 60.2 



70.3 ... 67.7 



63.9 61.8 64.2 



66.2 58.5 62.1 



63.6 



64.0 65.3 67.5 



60.7 61.4 69.2 



66.0 61.4 64.8 



64.0 56.5 60.0 



60.4 62.9 



Mean 63.3 64.6 70.4 73.6 71.1 66.9 66.3 61.7 65.0 



Mean 63.2 63.9 70.7 78.6 71.8 66.9 66.2 61.8 64.0 63.4 62.6 62.0 



66.7 



