OE NEBULA AND OLTTSTEES OE STARS. 
17 
No. 
2 h 20 ra 57 s *8, by the observations in different sweeps differing only 18 s in R.A. 
The latter is the more correct ; so that M. Auwers’s remarks on this nebula 
are not confirmed. The cause of the disagreement lies in a misprint in P.T. 
(See List of Errata.) 
557} 
ggg In Lord Rosse’s description of this group, a=No.557=h.231; /3=No.563=h.234; 
ggg y=No. 558=231, a; S=No. 559=231, l. The other nebula, “ about 12' south 
following,” is probably No. 563 =h. 234. No.561=h.233 seems to have escaped 
notice. 
571 h. 240=11. 238=111. 198. C.H. has overlooked or omitted an obs. of W.H. of 
III. 198 in sw. 574, which, referred to, confirms Mr. Marth’s surmise that the 
nebulae are identical. 
573 II. 6. This was probably really a comet, as indicated by its description, having 
been subsequently looked for and not found. 
574 h. 244=1. 102. M. D’ Arrest found this nebula, when observed with the Leipzig 
refractor of inches aperture, inferior to a 1st class nebula. In this Cata- 
logue, from a mean of 5 observations, it ranks as “ considerably bright.” 
591 h. 258=1. 1. M. D’ Arrest found this nebula, when examined with the Leipzig 
refractor, not entitled to rank above the 2nd class. With this our present 
Catalogue agrees, it being set down from a mean of 8 observations as “ pretty 
faint.” 
614 This nebula of Bessel was also looked for and not found by D’Arrest, who there- 
fore supposes it to have been a comet. 
636 h. 280 = 11. 502. II. 502 is described by H. as eS; F; stellar. Either then the 
identity is doubtful, or some change must be suspected. The place, however, 
agrees well. 
639 h. 281 =IV. 43. Once looked for by Lord Rosse, but not found. (See notes on 
134, 472, 510.) 
646 h. 284=111. 578. The same remark. Twice looked for unsuccessfully by Lord 
Rosse. On one occasion clouds were passing. 
654) In Lord Rosse’s diagram of this pair and the neighbouring stars y and S, the figure 
655) is in contradiction with the measures. The position of ay, instead of 2°, should, 
I presume, have been stated thus, yoj=178°, or, which comes to the same thing, 
ay= — 2°. This has been assumed in deducing the place of No. 655 = 289, a 
from No. 654=h. 289. 
656 h. 291=111. 591. H. makes this nebula to be the nf of two, but both those of 
h. the sf. 
674 h. 293=11. 603. H.’s description is pB; stellar; ape# with eS, vE chevelure. 
The place, however, agrees well with that of h. 293. 
684 III. 195. Auwers makes the R.A. (1830)=3 h ll m 50 s and C.H. 3 h 10 m 13 s ; but 
mdccclxiv. d 
561 
563 
