( 485 ) 
Meyses three out of twelve differences from the arithmetic mean exceed 
the negative quantity —0’’88, whereas in the author’s results five 
out of nineteen differences exceed the positive quantity —+ 0".88. 
Accordingly the difference between the two results may be considered 
as purely accidental. 
(The last sentence does not occur in the original. It should be 
remarked that in the publication of 1880, the last difference from the 
arithmetic mean for 1879, must be + O",74 instead of + 1,74). 
ERRATA. 
Page 238, line 5 from bottom, for “increases” read “decreases.” 
op HAO) ey ee gg) me = ze IN rgemol INU 
edt ep SOE rp » I" read T" (twice). 
» 241, in the formula for Xip7, X,, Xipr read zipr, 2,, XypT- 
(January 25, 1905). 
