DEPARTMEN r OF I\1J<:R1DIAN ASTROMETRY. 



191 



portions of the curve were quite indeterminate because of the rehi- 

 tively small amount of material, but the better determined part 

 served as a guide toward filling out such regions. Since the curve 

 shows tendencies toward a sine cosine effect, a computed curve is 

 given under the heading Comp. While the computed curve gives a 

 fair representation of the observations, there seem to be systematic 

 corrections to the computed values, indicating a real effect. There- 

 fore the curves representing the observations were adopted. 



A second approximation was made to the clock corrections, em- 

 ploying the diurnal term. The resulting corrections were 



Aa = -0!0093 sin a +0^0076 cos a 



The close agreement of these values with those of the first approxi- 

 mation rendered a second approximation to the diurnal term unnec- 

 essary; nor was it deemed necessary to further refine the terms 



