Perusal of a late Publication by Mr. Babbage. 47 



case in other respects as at Maranham, the circle rested on a 

 firm basis of rock, the recalculation shows that the record of 

 the level was unusually free from error. The observations at 

 Spitzbergen recalculated with 10'9 are as follows: 



Southern Meridian. Northern Meridian. 



1823. July 5. Sun... 79° 49' 58"-6 July 6. Sun... 79°49' 44"-8 



12. ... 79 49 57 -0 7. — ... 79 49 52 -7 



9_ >t< jq 49 53 .g 



Mean; noon obs. 79 49 57 -8 lo! — ... 79 49 51 -6 



Mean; midnight 1 - Q 4Q 5Q - 

 observations... / 



Mean latitude from northern and southern observations 

 79° 49' 54"-25. 



The mean latitude with the same observations calculated 

 with the divisions of the level as single seconds is 79° 49' 57"*8. 

 The recalculation with 10*9 manifests a slight defect in the 

 vertical adjustment of the circle, which defect was previously- 

 masked ; and the observations being separated into northern 

 and southern results, are found to agree, with a single excep- 

 tion, and that not to a great amount, even better than they 

 appeared to do before. 



The observations with the circle were originally noted down 

 in pencil on detached pieces of paper ; they were calculated, 

 and transcribed in the form in which they are printed, either 

 at the station itself, or on the passage to the next station ; the 

 transcript was made in duplicate, and one of the copies sent 

 home. The original pencil record may not always have been 

 preserved after the transcript was made; and of those then 

 preserved, some have probably been lost in the years that have 

 since passed, as I have never had the advantage of a fixed 

 residence, and have frequently been obliged to move all that 

 I possessed from place to place. I have been so fortunate, 

 however, as to find several of these original papers in search- 

 ing in the last few days ; amongst them are three of the four 



the apparent places of the two southern stars, as furnished to me a few 

 days since by Mr. Taylor, of the Royal Observatory, from the latest ob- 

 servations, are as follows : 



1822. August 28, a Lyrae 2° 31' 22" 



29, * Lyras 2 31 31-8 , «n»ll»W 



29, *Pavonis... 2 31 314 1 ^ , ft ,i % 



31, * Lyras 2 31 42-6 * DecL 57 17 2 ' 



31, *Cygni 2 31 38-8 (R p , ,- Q4 



Sept. 2, « Gruis . ... . 2 31 34-8 { g^ g « J| 



Mean.... 2 31 336 



latitudes 



