COMPARISON OF CATALOGUES OF STARS. 



401 



Residuals in 8. 



It did not seem necessary to recompute the double argument corrections in a, 

 but for the terms depending on a and S new curves were drawn from the values of 

 Aa given above, and the secondary corrections obtained were applied to the corre- 

 sponding values given by the first set of curves. 



The residuals in declination, however, appeared to require a complete second 

 approximation. Accordingly, new curves were drawn from the residuals in S, in the 

 manner described above. The results from the two approximations are combined in 



the following tables. 



Aa. 



Auwers minus Harvard College. 



