NO. 7 



THE ATMOSPHERK AND THE SUN CLAYTON 



19 



Table 6.— Means of 4 Periods of 7 Days Each, St. Paul, Minnesota 



Observed pressure, 29.00 + inches 



Consecutive means of 4 periods, 

 29.00 + inches 



I^ay ' 2 3 4 5 6 7 I 2 3 4 s 6 7 



Nov. 4 .68*1.02 1.32 1.24 1. 16 1.26 .86 



II .66*1.42 1.26 1. 14 .92*1.38 1.28 .88 1. 12 1. 18 .98 .86*1.29 I-I3 



18 1.30 1.28 .94 .84* .94 1.26 1.02 1.06 1.24 1. 17 .87 .81*1.18 1.22 



25 .88 .76 1. 18 .70 .42*1.26 1.36 .98 1.20 1. 15 .79 .76*1.12 1.04 



Dec. 2 1.40 1.48 1.30 .78* .96 .82 1.20 1.02 1. 10 1.22 .94 .89*1.13 I.I4 



9 1.34 1.28 1. 18 .84 .70*1.14 .58 1. 16 1.26 1.261.101.0S .93* .97 



16 .46* .88 1.20 1.46 1.48 1.32 1.40 etc. 



23 1.46 1.42 1.38 1.32 1.08 .42* .68 



* Minimum. 



Fig. 12. — 7-day pressure wave. 



