Editorial 
265 
U (u — 1) 
+ 
II, {u — I) ^ „ ^ , 
— H' (« - 1 ) ^,i_i/U,„_.> {jlu+:; + 'i/^^/^u+i — /LtaMw) 
«^'Ch-1) , 
+ 
and (40), (46) and (47) must be modified accordingly. It remains true that for 
a normal population M.^ vanishes when u is odd, and that in all cases x ^ . 
If we write this value of M.. in the form 
vr n- 
then in order to obtain correct to - , the third term may be omitted, R has the 
same value as in Equation (47) of the paper cited and K is zero for normal distri- 
butions when a is odd. For even values of u in normal distributions the value of 
Z'is 
u (/i.,,;' - ^ ^ — i^u-i yt^ii^M - ^J■■i^^u-), 
which easily reduces to — AmxP x /i,,t, where P = /a,„ — as in Equation (52). 
We may therefoi'e add to Table I on p. 39 of the original paper the following 
column : 
It 
K 
2 
- 2/Llo3 
3 
0 
■ 4 
- 576/Li.,'' 
5 
0 
6 
- 457,650/i.,'2 
Biometrika xii 
18 
