542 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 105 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 40° N. Long 180° 



950 mb. + 



Mean 67.1 58.3 65.3 69.7 67.9 67,6 74.9 72.7 65.4 64.6 66.1 60.0 



66,8 



Mean 61,5 61.1 66,2 69,4 69.2 69.4 76.2 74.7 67.9 64.2 66.1 61.2 



67.2 



