548 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 40" N. Long. 0° 



950 mb. + 



Mean 70.0 67.9 66.6 64.0 64.8 65.9 66.0 65.8 66.1 66.6 66.2 67.4 66.4 



Lat. 40° N. Long. 20° 

 950 mb. 4- 



E. 



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



