530 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10^ 



Lat. 50° N. Long. 

 950 mb. + 



INTERSECTIONS 



180° 



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



1929 



37.3 38.8 60.3 Gl. 



59.4 65. 



64.3 54.0 56.4 52.4 



64.9 



Mean 47.6 50.0 55.7 59.0 58.9 60.9 65.8 64.4 61.6 58.3 56.6 49.4 57.4 



