so 



MEASUREMENT OF AN ARC 

 r SE1RFENTI&* 



18 6 



Left Arc. 



18 6. 



Right Arc. M E A N. 





MONTH. 



April 20 



22 - 



27 

 May 1 



j Mean 



o , r, 1 MONTH. 



§ 18 41.53 ' April 19 

 41.17 21 



5 18 30.3 

 31.62 

 31.48 

 30.67 



5 18 36.02 

 Refraction, &c. &c. . . . . -f 5.39 





41.03' 



» • 30 



Mean 



Zenith distance, .... 5 18 41.41 



■ 



'5 18 41.03 



5 18 31-02 







* HEftCUIlS. 



April 28 



May . 1 



Mean 



3 37 38.15 

 39.49 



April 27 

 30 



May 2 



• 



Mean 



3 37 31.35 

 32.15 

 31.09 



Refraction, &c. &x. 

 Zenith distance, 



3 37 35.17 



.3 37 38.58 



3 37 38.82 



3 37 31.53 





OFHIUCHI 



April 25 

 28 



Mean 



43 4.89 

 1.95 

 3.75 



1 43 3.53 



| April .24 

 27 



30 



May : 2 



Mean 



55.77 



54.1 



54.16 



O O » _»_J 



1 42 54.85 



1 42 59.19 

 Refraction, &c.' &c. . . . . -f 1.5 



Zenith distance, . „ . . . 1 43 0.69 



April 12 

 14 

 16 



18 

 21 



• 25 

 28 



May 1 

 1 Mean 



2 35 15.56 

 18.87 

 16.04 

 18.23 

 20.37 

 18.12 

 16.85 

 18.87 



April ' 13 

 15 

 17 

 20 

 24 

 26 

 SO 



.May 2 



Mean 



•2 35 10.72 

 10,04 

 11.83 

 10.49 



9.50 

 9.11 



8.9 



8.34 



,- 2 35 13.87 

 Refraction, &c. &e. „ . . . + 2.57 







Zenith distance, .... ,2 35. 16.441 



-i. -r ■■;-i.- l -nT-sa-g--68-r-r-.- _,_:t_r i i WWj^W ■ ■ • r "» - 



2 35 17.86 



2 35 9.87 



