[ 4 r2 ] 
opportunityof determining its place, as near as I could, 
by a fingle obfervation, in the following manner. 
At 6 h 59' 54/' t fidereal time, I obferved the 
pafifage of the Comet over the perpendicular wire of 
my equatorial SeCtor j then leaving the inftrument 
in the fame pofition till the next evening, I obferved, 
that at 22 h 8' if fidereal time, the 17th ftar of 
Eridanus in the Britilh Catalogue palled over the 
fame wire (or horary circle) 9' 30" more foutherly 
than the Comet. And at 23*1 45- 36" fidereal time 
the ftar marked b in Eridanus palled, 19' 55 more 
northerly than the Comet. 
I found that the fituation of my inftrument was 
not fenfibly altered between the 18th and 19th of 
October ; for the tranfits and the difference of de- 
clination of the fame ftars being obferved with it 
again on the 19th of October, they agreed very well 
with thofe that were taken the preceding night. It 
may therefore be fuppofed, that the polition of the 
inftrument continued the fame like wife during the 
time of the foregoing obfervations. 
The right afcenfion of the 17th ftar of Eridanus 
being 49 0 39' 10" and its declination 5 0 ff' 2f" fouth ; 
and the right afcenfion of h of Eridanus being 73 0 
59' 25" and its declination 5 0 2f' 10 fouth; I col- 
lected, that when the Comet palled the wire (or ho- 
rary circle) which was October 17^ 17 11 12 mean 
time, its right afcenfion was 182° 34' o ' and its de- 
clination 5 0 45' 35’" fouth. 
The laft time that I faw the Comet was on the 
19th of October in the morning; but it then ap- 
peared fo faint, that I could not obferve its place. 
Its elongation from the fun was then but about 20 
degrees jj 
