( 5S ) 

 J- Albrccht — ./• computed. 



l/ï 



A a;^ 



= ± 0".040 



l^£Aü!=±„... 



'.Oil 



whilst Albkecht assumes as mean error of his co-ordinates the value 

 0''.04, differing but slightly from the former. The residuals however 

 show more than once a systematic character. 



In the second place the original results of observations — usually 

 monthly means — as they are communicated by Albrecht, were com- 

 pared with my formula, and for each observatory ^) the mean devia- 



1) If tliere exist for o/ie observatory various separate series of observations, I reckon 

 them each separately as i^LBRECHT does; besides as he I use only tbe observations 

 till 1896.5. So, if we leave out 4 very short ones, we arrive at 2? series. Neither did 

 1 take into consideration the observations which Albrecht laid aside on account of 

 clearly appearing systematic error. 



4* 



