WHOLE VOL. LAT. 4O N. 549 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 40° N. Long. 30° E. 



950 mb. + 



Sate Jan. Feb. Uar. Apr. Hay June July Aug. Sept. Oct. Nov. Dec. Tear 

 1929 71.0 65.9 71.1 63.7 62.3 63.0 62.0 59.5 66.0 66.4 68.8 68.6 65.7 



Mean 68.6 66.4 65.1 62.6 62.6 61.5 58.6 59.2 63.4 65.7 68.4 67.9 64.1 



Lat. 40° N. Long. 40° E. 

 950 mb. + 



Date Jan. Feb. Har. Apr. May June July Aug. Sept. Oct. Nov. Dec. Tear 

 1929 70.7 64.9 69.8 64.4 61.7 60.2 58.0 56.4 63.9 67.2 69.5 69.6 64.7 



Mean 74.1 69.5 69.1 63.9 63.5 59.4 56.3 58.8 63.7 69.5 73.1 73.1 66.8 



