m 



MEASUREMENT OF AN ARC 



II. Means of the Zenith dillances, taken on the ifjht and left Arcs^ 

 correded for refradtion, equation of the ietlonal. tube, and the meaiai 

 runsof the micrometer; 



K 



DISTANCE PUN NAE 



"LEONIS. 



i 1809. 

 > Month. 



April 13 

 16 



18 

 20 

 44 



26 



28 



SU 



May 3 



(» 



Menn 



■W«s^.^^^^"»^P'9»'W<^*^""=??«^ 



Left Arc, 



2$ 



63 928 



54.'ilO 



£4.1 16 



54.807 



56,074 



66. 01, 



66.747, 



66,97'2, 



63.570 



■3, 6s.fiSUP9j 



1809. 



Month. 



cil 12 

 1?' 



m- 



27 



29^ 



2 



6 



7 



Menn 



llight Arc. 



36 



45.100 



43.520 



4,3 635 



43.161 



41.730 



4cl.876 



43.523 



42.79^9- 



4^.4U6 



44 365 



41.646 



2 S6 43.615 



M'eau.. 



2 33 49.362 

 Refraction, &c. &<"• + 2.664 



Z«-i>ith^is(ance, 2 26. 61 926 



April 13 



4 



4S 



36.359 



April 12 



4 45 



15.280 



4. 4S 



I9il76 



16 







23.581 



14 





14.181 



Refractioiij ,&c. -{-. 



4.803 



i 18, 







26.093 



17 





14.017 







" ~" ■" 





94 







23.235 



20 





12.976 ZealthjdUiauce, 4.45 



23.979 



% 26 







21.117 



25 





14.799. 





28. 







23.855 



27 





12.416 







SO, 







24 981 



29 





11.798 







V M«y 3 







96 058 



M»7 2 





12.lt9 







6 







24.878 



6 





12.191 







i 







25.759 



7 

 Mean 





13.8! 7 







It Mean 



4 



4$ 



24o892 



4 45 



13.459 





