16 
SIR J. E. W. HERSCHEL’S CATALOGUE 
No. 
442) 
444J 
442) 
444 
445 
446 
447 
462 
472 
487 
501 
510 
516 
536 
rative of Piazzi’s designation of it as “ Nebulosa,” it is retained for occasional 
future examination. 
h. 169, II. 221. The places agree almost exactly, but the descriptions are irre- 
concilable. One makes the nebula round, the other much extended. They 
are therefore almost certainly distinct nebulae, and there is therefore probably 
some error in the R.A. of II. 221. The neighbourhood is rich in nebulae (see 
the next note, however). 
In Lord Posse’s diagram of the group about h. 169, assuming a to be h. 169 
= No. 444, the others will be /3 = No. 445 = 169, a; y=No. 446=169, b ; 
S=No. 447=169, c; and s=II. 221. 
h. 179=50 Cassiopeiae. Retained in the Catalogue for future occasional obser- 
vation. Nothing can be more difficult than to verify or disprove the nebulosity 
of a considerable star under ordinary atmospheric circumstances. 
h. 184=111. 583. Though Lord Rosse on one occasion did not find this nebula, 
its existence cannot be doubted, having been found by h. nearly in the place 
assigned by C.H. 
h. 193=1. 152. M. D’Arrest found this nebula too faint for observation with the 
Leipzig refractor, though placed by W.H. in Class I., and standing in this Cata- 
logue (from a mean of 3 observations) as a “ bright ” nebula. 
h. 204=111. 604. C.H. and Auwers make the R.A. l m less. Both H. and h. rely 
on single observations. Sweep 188 h. examined and reduction found correct. 
h. 206=111. 457. Not found by Lord Rosse; once looked for. See notes on 
Nos. 472 and 132. 
h. 210=11. 246. Singularly enough, h. and H. are at issue about the two adja- 
cent stars, h. makes the stars south of the nebula; H., on the contrary, places 
the nebula south of the stars, and says expressly that both this nebula and 
III. 201, observed just previously, were similarly situated with regard to their 
attendant stars. Now in h.’s obs. of III. 201 (No. 513) the attendant star is 
stated to be sf the nebula, and in that of II. 246 the larger of the two stars is 
south and only a very few degrees preceding. I believe the error to lie on the 
side of the older observations, as I have a diagram of the small star nearer to 
II. 246, sf, which shows that I made no mistake of n and s. 
I. 153. Auwers makes the R.A. for 1830 l h 28 m 45 s , whereas C.H. makes it 
2 h 15 m 13 s . The cause of the discordance lies in an erratum in P.T. (see list 
of errata). In C.H.’s reductions the error is corrected, and I find the correc- 
tion verified on reference both to the Register (H. 1488) and the original sweep 
(sw. 596). The nebula follows (not precedes) the determining star. 
549 h. 226 = 1. 154. Auwers makes the R.A. of this for 1830, 2 h 23 m 8 s ; C.H. 
