496 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



1930 

 1931 

 1932 

 1933 

 1934 



1935 

 1936 

 1937 

 1938 

 1939 



SEA-LEVEL PRESSURE AT 10' INTERSECTIONS 



Lat. 80° N. Long. 120° W. 



950 mb. + 



1929 76.6 66.4 68.5 



64.0 64.3 



73.3 71.0 



70.9 62.7 



56.5 74.9 



63.9 65.1 



68.3 

 77.1 

 61.6 

 68.8 

 67.0 



65.6 

 79.2 

 60.1 

 69.2 



72.8 

 80.8 

 80.8 

 76.9 

 69.2 



75.3 

 73.1 

 81.2 

 67.1 



(2.4 74.9 75.8 68.5 67.0 70.5 



60.5 



rS.O 66.4 



76.4 



80.9 

 76.8 

 75.9 



81.2 

 73.6 

 73.6 

 68.8 

 72.3 



Mean 68.0 C8.8 74.6 75.2 



70.7 

 74.2 

 76.3 

 73. S 

 60.2 



76.8 

 73.0 

 73.0 



71.9 

 73.4 



68.0 

 74.0 

 68.1 

 69.3 



68.8 

 67.5 

 62.7 



70.3 60.0 72.3 73.1 



61.3 62.6 66.4 64.5 60.9 65.0 

 66.8 61.3 61.8 62.9 68.3 59.3 

 69.0 68.9 68.0 65.4 



64.1 66.0 7,3.1 68.6 70.5 69.5 



63.2 60.6 66.6 63.6 



63.2 61.5 66.9 68.9 65.7 63.9 



64.5 57.7 60.6 66.6 68.8 73.5 



60.5 69.2 



69.7 65.2 62.2 66.9 66.0 68.5 67.0 



70.0 



69.8 

 68.6 

 68.8 

 68.8 

 68.7 



69.6 

 67.7 



68.8 



Lat. 80° N. T;onu:. 100° W. 

 950 mb. + 



Date Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Year 



67.7 66.9 69.9 60.8 71.9 



65.5 



70.7 69.5 71.3 71. S 



61.8 62.5 66.3 60.3 59.8 64.4 

 66.6 60.5 62.0 62.4 66.7 58.0 



68.4 68.6 65.8 64.0 



65.0 65.3 72.2 68.8 69.7 68.8 



62.6 60.2 66.9 63.7 



64.2 61.5 64.0 67.2 64.2 64.2 



64.0 57.4 60.7 60.5 68.2 72.4 



60.3 . . . 62.2 68.6 



65.3 61.8 66.3 65.0 67.4 66.1 



69.4 



69.1 

 67.8 

 68.1 

 67.8 

 68.3 



68.3 

 68.8 

 67.5 



