TABLE U 



STATISTICS OF DIFFERENCES IN DEPTH ( IN FEET) OF 



20° ISOTHERMS FOR LAGS OF DIFFERENT INTERVALS 



Standard Extreme 



Lags N Mean Deviations Differences 



50-second 



series : 



50" 9075 0.82 1.16 22 



100" 9031 1.50 1.73 35 



150" 8991 2.07 2.14 21 



200" 8954 2.52 2.48 19 



250" 8920 2.89 2.75 21 



300" 8887 3.17 2.94 22 



350" 8854 3.40 3.09 24 



6-minute 

 series: 



6' 4718 3.48 3.22 26 



12' 4689 3.53 3.88 33 



18' 4662 5.44 4.59 35 



24' 4642 6.26 5.11 41 



30' 4620 6.88 5.64 43 



36' 4603 7.42 6.09 40 



42' 4589 7.95 6.43 38 



48' 4576 8.47 6.78 45 



54' 4563 8.84 7.12 46 



60' 4554 9.30 , 7.40 53 



426 



