On the Great Comet of 1843. 203 
as iad Date ne “ecent ap Rae revotution® aid neal! 
a period. - 
B.C 13 175.00 104 21.876 
A. D. 268 (?) 9x 175.02 72 X21.878 
442 (?) 8X 175.15 64 21.894 
7X 175.17 56 X 21.896 
5X 175.04. 40 21.880 
1143 (*) 4 175.05 3221.881 
3x 175.40 ~~ 24% 21.925 
1493" BCTTS: 10 ** > ~16X21.888 
on 1668.2 (*) 1175.00 © 8X 21.875 
Perio of “eight revolutions 5 
: Date, ica es ceding expected return|Single revolutions and mean 
- if “1865,04. period. 
: B. c. 60(*) 11X175.00 | 88X21.875 
* Ard. 290-4) 8 9X 175.00 — 72 21.875 5 
Re (?) 7XK175.14 56 X 21.892 ; 
: 815 6X 174.99 | 48 * 21.874 
990? 5X 174.99 40 X 21.874 
1165 LA 175 23 32 X 21.904 
‘ 1340* 3X 174.98 24% 21.873 
wb ea BUG Peetoe cfs, 42K VILATS oe fi: {6 X21.809 
. 1689.95(*) | 1175.00. | 8X21.875 
“1865.04. | AF Hi oi 
ee ee ee "Periods of eight revolutions in 
ee Seer preceding rppected return Single evn ‘and me ag to 
Bie. DIM G44 ee © 96X21.874-" |» 
PR ie: CRS » 64 21,856 
si Oe Oe Ox 17497, |. 48X21.871 
“1012 (*) 5X174.96 | 40X21. 
1962 (+) ih ent 5 ada iii 
1 ABT (Bp emebin dost tue ee 
“We eee naihd the aptulon es pm able astronomers, that 
the densest povsinn of. the nebulosity of the recent comet (neces- 
ected as the proper point for micrometric measures) was 
eccentric to ong from the real head or centre of gravity 
of the comet, tail and nebulous envelope. In fact the comet nev- 
er presented any appearance | of a distinct kernel or head, but only 
a.vague and ill-defined nebulosity or cloud, gradually condensed 
towards the centre, or, according to Messrs. Herrick and Bradley, 
towards a point nearer the sun than the centre of the disc (if we 
may so call it) of the nebulosity. In Prof, Bartlett’s letter, men- 
oe 
