OBSERVATIONS WITH THE ZENITH TKI.ESOOPE. 



149 



The two scries of values for I-II, II-III, and III-IV have been combined by 

 weights in the final expressions given below.* 







Aij, 



K 



Wl. 







&</> 



K 



Wt. 



1894. Feb. 



36 



Mar. 14 



I— II 



+.044 

 | .030 

 | .063 



+19.57 

 20.98 

 20.32 



1 96 

 1.84 

 1.80 



1895. Jan. 30 

 Mar. 20 



I— II 



+.143 

 +.111 



+18.77 

 19.64 



1.36 

 1.93 



Mean 



May 10 



36 



June 16 



July 3 



II— III 



| .0455 



—.188 

 —.017 

 —.018 

 —.050 



■1 20.24 



+ 10.37 



11.53 



11.17 



9.82 



5.60 



1.66 



0.90 

 2.47 

 1.07 



Mean 



May 17 

 39 



June 9 

 35 



II— III 



+.1238 



—.159 

 —.073 

 —.147 



— 274 



+19 28 



+ 11.17 

 11.43 

 11.57 

 10.89 



3.2!) 



2.55 

 1.42 

 1.87 

 0.56 



Mean 



July 17 



Aim;. 7 



34 



Sep. 13 



III— IV 



—.0697 



+.071 



| .099 



+.099 



—.045 



+10.77 



+11.69 



12.23 



11.30 



9.34 



6.10 



2.86 

 2.04 

 2.47 

 1.48 



Mean 



.July 15 



38 



Aug. 13 



III— IV 



—.1465 



+.074 

 —.015 

 +.030 



+11.32 



+11.46 

 12 23 

 11.52 



6.40 



2.39 

 2.40 

 2.79 



Mean 



Oct. 15 



Nov. 5 



30 



Dec. 4 



IV— I 



+.0659 



—.334 

 —.261 

 —.387 

 —.312 



| 11.30 



+18.87 

 19.67 

 18.56 

 17.03 



8.85 



3.24 

 3.03 

 2.42 

 2.05 



Mean 





+.0296 



| 11.73 



7.58 



Mean 





—.2880 



+18.67 



10.74 







19.88 a; + .0748 = 

 11.05a;— .1090 = o 

 11.50 w |- .0492 = o 

 18.67 x— .2880 o 









Alien' 



61.10 



; 

 Uion 



s — 



» \ < 

 / = 



2( 

 20' 



.2733 = 



.004473 



.0915 

 1.4451 

 '.5366 





Adopting this value of the constant of aberration as that best suited to present pur- 

 poses, the necessary correction to the latitude is found by multiplying (be computed 

 reduction for aberration by the factor .004473. 



Aiter applying these corrections to the Latitudes we are prepared to form the con- 

 dition equations for adjusting the declination systems of the different groups in order to 

 free the results from systematic differences. 



* If we reduce these as two separate series, the term I VI appearing in both, we find tor the conitant of 

 aberration — 



First series, 30".5377 

 Second " 20 .5393. 



