536 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 50° N. Long. 0" 



950 mb. + 



Bate Jan. Feb. Har. Apr. May Jane July Ang. Sept. Oct. Kov. Deo. Year 



1929 74.8 67.6 76.0 64.9 



65.6 



66.8 67.8 66.7 69.6 61.6 59.1 60.0 



Mean 65.8 67.2 66.0 63.4 65.2 66.3 65.6 66.3 66.4 64.6 62.9 64.2 



66.7 



65.2 



