( 418 ) 

 TABLE IV. 



A sufficient control is obtained here by comparing the values for 

 A 31= 0" (epheraeris), A .¥= + 40" and A if = + 50". 



In comparing with the observed apparent places w^e obtain the 

 following differences — C : 



TABLE V. 



By means of interpolation between the values of A « we find as 

 resulting value for A J/ -|~ 46"412, leaving the following errors : 



From this follows that by a variation of M alone, the differences 

 — C in a can be reduced to very small quantities, but this is 

 not the case with the differences in d. It could be seen beforehand 



