5IO 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 70° N. Long. 60° W. 



950 mb. + 



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



1929 



59.3 



r;2.1 



ryO.8 



05.1 63.4 (;:i.r> 



59.0 61.9 58.3 54.0 57.8 48.3 57.9 



60.7 65.5 65.8 



60.4 60.3 59.2 



61.1 57.0 58.8 

 59.0 53.6 58.4 

 60.3 57.3 57.2 



54.6 56.2 62.1 

 61.9 58.2 58.6 



57.7 52.4 54.0 



56.5 55.0 54.2 



59.2 57.7 58.7 55.8 52.5 53.4 58.1 



Lat. 70° N. Long. 50° W. 

 950 mb. + 



Lat. 70° N. Long. 40' 

 950 mb. + 



W. 



