50 Mr. Rumker's Elements of the Comet in Pegasus. 



diem, of the mean. These results are quite as accordant as 

 those which I had obtained under the same circumstances. 

 I may remark als©, that Capt. Ronald's mean result differs only 

 one-fiftieth of a vibration in twenty-four hours from the mean 

 result of my observations. 



Further, if the observations are examined of the many per- 

 sons, both in this country and elsewhere, in conjunction with 

 whom I have at different times made pendulum experiments, 

 amongst whom are several who, though eminent observers in 

 other respects, were unaccustomed previously to that kind of 

 observation, — abundant evidence is afforded, that the circum- 

 stances being the same, the accord of the partial experiments 

 is nearly the same, whether the observer be previously in-< 

 experienced, or whether he has had, as I undoubtedly have, 

 the advantage of very considerable practice. 



IX. Corrected Elements of the Comet lately observed in Pe- 

 gasus, founded upon Observations made by Mr. Taylor at the 

 Royal Observatory; with Observations and Elements of the 

 . same Comet, by M. Valtz, ofNimes. By Charles Rumker, 

 Esq. 



To Richard Taylor, Esq. 

 Dear Sir, 

 ^JINCE your last Number was published, I have had an op- 

 ^ portunity of correcting my elements of the late comet in 

 Pegasus, upon the observations made thereon at Greenwich, 

 and communicated to me by Mr. Taylor ; and I have now the 

 pleasure of sending you these observations, together with my 

 corrected elements. 



Observations made at Greenwich. 





Sidereal Time. 



Apparent 



Apparent 







Right Ascension. 



North Polar Dist. 



1830. May 4 



h m s 

 17 45 59-3 



O / // 



21 15 43*4 



71 57' 18*6 



16 



17 27 48'3 



21 18 21-3 



67 21 54-4 



17 



17 33 41-6 



21 18 21-3 



67 4 19'4 



22 



17 31 42-8 



21 18 46-0 



65 43 1-4 



30 



18 8 22-2 



21 15 13-1 



64 2 50*5 



June 1 



18 9 20-2 



21 14 10-7 



63 43 42-5 



Corrected Parabolic Elements of the Comet. 



Time of passage over the perihelion, 11th of April, 2 h 7 ra 30 s 

 Mean time at Greenwich. 



Longitude 



