WHOLE VOL. 



LAT. 40 N. 



543 



SEA-LEVEL PRESSURE AT 10° INTERSECTIONS 



Lat. 40° N. Long. 150° W. 



950 mb. + 



Mean 66.6 64.7 67.4 68.5 70.8 70.6 76.4 75.6 71.2 65.7 66.8 



68.9 



Mean 69.7 67.7 68.7 68.1 71.9 71.2 76.2 74.4 72.4 68.9 69.6 66,7 



70.8 



Mean 70.0 68.6 69.0 68.6 70.4 69.4 71.1 70.3 66.9 69.6 70.8 68,1 69.3 



