m 



Mr, Pond's Catalogue of Eighty-four 

 fy Draconis. 



18 18, June 15, 16, 21, 33, 28, 

 «9> My ^y 7» 8, 9 



July 10, 11, 14, 17, 19, 20, 21, 

 22, 28, 29 • 



July 30, 31, Aug. 1, 3, IS, 15, 



Sept. 15, i6y 18, 19, 20, 21, 

 Oct. 1, 3, 5, 8 



Oct. 9, 15, 21, 24, 26, 28, 29, 



31, Nov. 3, 6 



Nov. 8, 15, 19, 20, 21, 22, 23, 

 Dec. 5, 6, 8 - 



Dec. 9, 10, 13, 15. 1813, June 

 2^, 24, 25, 26', 27, 28 - 



July 5. ^> 9» 10* ii> i*» i3» i^» 

 17> 18 



July 19, 20, 22, 23, 24, 25, 26, 

 27, 28, 29 - 



Mean of 10 

 Mean of 20 

 Mean of 30 

 Mean of 40 

 Mean of 50 

 Mean of 60 

 Mean of 70 

 Mean of 80 

 Mean of 90 



3.845 

 3>8ia 

 3,602 



3.^03 

 3.^12 



3.^35 



3.^74 

 3.^52 



This determination of 7 Draconis is extremely exact. Its 

 zenith distance has also been determined, with equal accuracy, 

 by 120 observations made with the zenith sector during the 

 years 1811 and 1812: the mean of above 60 observations of 

 1811 do not differ more than one-tenth of a second from the 

 mean of an equal number in 1812. 

 Mean zenith distance beginning of 1813 by / // 



pbservations of 1811 - - . 3 17.8 



By observations in 181a - - • a iy,g 



Mean zen. distance by zenith sector - 2 17-85 



N. P. D. by mural circle - - 38 29 3.65 



Sum or Co. latitude - - - 38 31 21.5' 



