MEASUREMENT OF AN ARC 



» SERPENTIS. 



O i 



Nearest point on Hie Limb, 3 55 S, 



1.811. 



Face. 



Observed 





Correction. 



Correct 

 Zenith distance. 



Thermometers. 









Month. . 





Zenith distance. 





Upper. 



Lower. 



, May 1 

 3 



4. 

 5 

 7 

 9 

 15 



E. 



■ ? w. 



E. 



; wJ 



E. 



' ■ W„ 



E. 



3 55 15.13 

 3 55 6,5 

 3 55 14 

 3 55 4 

 3 55 15.13 

 3 55 4.75 

 3- 55 11.63 





77.56 

 77.29 

 77.15 

 77.01 

 76.74 

 76.46 

 75.61 



3 53 57.57 

 3 53 49.21 

 3 53 56.85 

 3 53 46.99 

 3 53 58.39 

 3 53 48.29 

 a 53 56.02. 



Mean 



o 

 81 

 81 

 79 

 81 

 84 

 BO- 

 SS 







81 

 81 

 79 

 81 

 84 

 86 

 85 



; 



' 





82.13 



82.13 J 



May 



* SERPENTIS. 



Nearest point on the Limb, 1 10 M 



1 



E. 



3 



W. 



4 



E. 



5 



w. 



7 



E. 



8 



w. 



9 



E. 



15 



W. 





A 



11 

 11 

 11 

 11 

 11 

 11 

 11 



10.63 

 17.51 

 11.88 

 19.76 

 10.38 

 21.01 

 10.63 



11 21.13 



+ 

 67.83 

 67.51 

 67.35 

 67.18 

 66.85 

 66.69 

 66.52 

 65.48 



12 18.46 

 12 25.02 

 12 19.23 

 12 26.49 

 12 17.23 

 12 27.70 

 12 17.15 

 12 26.61 



Mean 



81 



81 



81 



81 



78 



78 



81 



81 



84 



84 



86 



86 



86 



86 



84 



84 



82.631 



82.63 J 





