OBSERVATIONS WITH Til 10 Z ION ITU TELESCOPE. 



311 



In the tabular statement which follows, the differences of the consecutive values of 

 the latitude are given, with the corresponding weight. The latter is computed by the 



formula 



in,. 1 



P 10 (ii \ ii') 



n and n' being the number of observations corresponding to the two values of the lati- 

 tude. When two differences are combined, as in the case of III-IV (Jan. 14-Jan. 20) 

 and (Feb. 22-March 29), the value of^> given is the sum of the individual weights. The 

 primed values I— II', etc., refer to the morning series. 



I- 



11 





.026 



p 

 2.30 



l 



P 



.4237 



II 



III 



+ 



.187 



1.26 



.7937 



III- 



IV 



— 



.121 



1.79 



.5587 



IV- 



V 



4- 



.1158 



1.09 



.9174 



V- 



VI 



+ 



.35)2 



1.32 



.7576 



VI- 



VII 



— 



.114 



1.22 



.8197 



VII-V1II 



— 



.207 



2.57 



.3891 



VIII- 



IX 



+ 



.187 



1.49 



.6711 



IX- 



X 



+ 



.154 



2.42 



.4132 



X- 



[ 



— 



.043 



3.29 



.3040 



1- 



11' 



— 



.231 



1.17 



.8547 



II- 



III' 



+ 



.323 



1.44 



.6944 



III- 



IV 



— 



.119 



1.87 



.5348 



IV- 



V 



— 



.055 



1.73 



.5780 



V- 



VI' 



+ 



.002 



.84 



1.1905 



vr- 



VII' 



— 



.179 



.53 



1.8808 



vu-vm/ 



— 



.072 



1.81 



.5525 



VIII- 



IX' 



+ 



.245 



1.07 



.9346 



IX- 



X' 



+ 



.108 



.94 



1.0638 



X- 



I' 



+ 



.040 



2.56 



.3900 



VI- 



[ 



+ 



.017 



p 



2.73 



r 



V 



.8668 



IV- 



VI 



+ 



.109 



0.34 



2.9412 



VIII- 



n 



+ 



.009 



1.07 



.9346 



V-VIII 



— 



.302 



1.80 



.5556 



VIII- 



in 



+ 



.220 



2.48 



.4032 



VI- 



IX 



— 



.112 



2.30 



.4237 



IX- 



V 



— 



.044 



2.64 



.3788 



VII- 



IX 



+ 



.039 



1.05 



.9524 



X- 



VI 



— 



.033 



1.07 



.9346 



VIII- 



X 



+ 



.132 



2.67 



.3745 



II-VIII' 



— 



.101 



1.89 



.5291 



iii- 



IX 



— 



.319 



3.73 



.2081 



IX- 



II 



— 



.051 



2.54 



.3937 



IV- 



IX 



— 



. 133 



2.85 



.3508 



X- 



III 



+ 



.108 



1.48 



.6757 



V- 



IX' 



+ 



.072 



.88 



1.1364 



X- 



IV 



— 



.078 



1.51 



.0023 



I- 



V 



— 



.066 



2.50 



.4000 



VI- 



X' 



+ 



.107 



.92 



1.0870 



11- 



VI 



-1- 



.050 



2.51 



.3984 



I- 



VII 



+ 



.034 



2.40 



.4005 



Representing by 1.2; 2.3; .... 1.2'; 2.3'; .... the required corrections to 

 the observed differences I— II, II— III, .... the conditions to be rigorously satisfied 

 are expressed by the 20 equations which follow : 



