794 



[CHAP. 23 



56 



i,i iin ii,ii 



30 Difference 

 in cm 



Fig. 23. Distribution of errors for the elevation ^i of the M2 constituent. Horizontal axis: 

 differences of observations minus computations, in cm. Vertical axis: number of 

 differences for 0, ± 1, etc., in cm. 



-66 -30 -25 -20 -15 



-^^ 







I 21.261 



5 10 15 20 25 30 35 -10 45 50 55 60 65 



SI. so 



7SIS- 



'-8I.74-' 



^ 85.03 



' — 88.62 — ' 



96.71 - 



99.10 ■ 



99.70 



lOO.OO*/.- 



70 Difference 

 in cm 



Fig. 24. Distribution of errors for the elevation ^2 of the M2 constituent. Horizontal axis : 

 differences of observations minus computations, in cm. Vertical axis: number of 

 differences for 0, ±1, ± 2, etc., in cm. 



