1118 



et Stebnitzky. ]l appears Ihat tbr «mail iiiagiiitudes Schwarzschild's 

 scale is narrower than Van Maankn's. F'or the corrected magnitudes 

 the numbers A,n are determined then. 



After this we find from 4 determinations: 

 .-T - 0",0035 =b 0,0007. 



This result now agrees with what we found from Mkssow's cata- 

 logue. The former result, based on Messow's visual magnitudes is 

 probably more reliable. 



We now perform the calculations for the catalogue of Pihl and 

 find from 4 deteiininations: 



jr r= 0",004 ± 0",0005. 



If we take into account all determinations we may deduce from 

 them as the most likelj^ value for the parallax: 



jr = 0",004. 

 Amsterdam, December 1917. 



