174 



ON THE SQUARE BAB MICROMETER. 



Observed Transits. 



Reduction; Equation (1) and Fourth of Equation (4). 



Comp. 



1 



2 

 3 



4 



Sill, chron. 

 Chron. corr. 



Sid. time, 

 Reduction, 



Cara.M.T. 



15 45 45.70 



49 47.05 



53 51.70 



58 33.05 



15 51 59.38; 

 -16 48.7 



15 35 10.7 

 6 33 5.0 



5.7; 



<! + <» 



2 



43 24.25 

 47 24.40 

 51 27.55 

 56 7.80 



+ 2 21.45 

 22.05 

 24.15 

 25.25 



+ 2 23.38 



i'.-t\. 



log (t, 



logV 

 log COS 8 



'i) 



50.8 

 60.3 

 69.4 

 80.1 



65.15 



1.81391 

 0.87506 

 9.60889 



h-t,. 



52.1 

 50.6 

 49.9 



48.8 



50.35 



1.70200 

 0.87506 

 9.60632 



2.29786 2.18338 

 + 198..55 + 152.54 = + 351.09 

 - 889.80 



-a=+2'23.38; 8'-8=-8 58.71 = - 538.71 



log (-ff) 

 log(d>-d) 

 log cos S„ 

 log tan 8d 



lOffK 



