372 COMET OF 1807 — 8. 



2 23 15 

 8 26 45 



12 43 45 



3 54 30 

 42 46 30 



8 21 20 

 42 9 

 41 56 30 



9 50 30 



The comet now became too obscure to make any observa- 

 tions upon it, with the sextant, although Mr Pease has given 

 two of the evening of the 22d of January, which he says are 

 true only to five or six minutes, as follows, 



22. about 7h Comet from a. Cygni. . . . 23° 18' 

 from Polaris. . . . 40 31 



The observations which follow are extracted from my own 

 journal. 



January 5th. The comet is no longer visible to the naked 

 eye; though having pointed the telescope to its calculated place, 

 I discovered it a little to the S. E. of * 2 Cygni; but this star 

 was not near enough in declination, to take the comparative 

 position of the comet, with the micrometer of the reflecting tele- 

 scope, in the manner pointed out by Dr. Maskelyne: however, as 

 an approximation is often desirable, I directed to the comet and 

 star, a very good small achromatic telescope, magnifying eleven 

 times, and found that the two objects were distant from each 

 other about two thirds of the diameter of the field of view of 

 the telescope, and having placed the comet and star across the 

 center of the field, and opening the left eye, I found that a 

 line joining the star and comet, produced, would pass through 

 „ Pegasi; the angle of the field of view of the telescope having 

 been ascertained to be 2° 18' 26", two thirds of which are 

 1° 32' 18" the distance of the comet from w 2 Cygni in the 

 direction " Pegasi; from whence a good approximation of the 

 place of the comet may be deduced. Note, the starw 1 Cygni 

 is marked in Wollaston's catalogue, of the fourth magnitude 

 and w 2 Cygni of the fifth magnitude, but w 2 is now the larg- 

 er; the stars ought, therefore, to change designations. 



The nucleus of the comet is yet to be distinguished by the 

 reflecting telescope, but as small as a star of the seventh mag- 



