38 
SIR J. F. W. HERSCHEL’S CATALOGUE 
No. 
It was observed in May 1852 as a nebula of the first class; subsequently as 
“ pretty faint and diluted.” M. Auwers found it “ surprisingly faint,” and of 
the 2nd class at the highest. 
4487 h. 2037=111. 743. This was seen as a planetary nebula in the twilight by 
M. D’Arrest with the 4^-inch refractor, and can therefore hardly be ranked so 
low as Class III. 
4536 h. 2062=111. 144. Not seen by Lord Rosse; once looked for. (See note on 
No. 132, &c.) 
4570 h. 2073. Not seen by Lord Rosse; twice looked for. h. has three observations 
agreeing well. The object is an equivocal one. 
45851 h. 2081=1. 103. According to an observation of Olbers, cited by Auwers, this 
4586 J is identical with No. 4585=1. 103, the place of the latter nebula, as assigned 
by H., being 20' wrong in P.D. This had escaped my notice until the nebulse 
in this Catalogue had been finally numbered and much other work accumulated 
on them ; and it was considered better to let No. 4585 stand, though erroneous, 
than to hazard confusion by striking it out and altering all the subsequent num- 
bering. 
4618 h. 2093. In conformity with Mr. Mason’s remarks on my observations of this 
nebula, and with his elaborate and excellent monograph of the great nebulous 
system of which it forms a part, I have diminished the P.D. in my Catalogue of 
1833 by 1°. It is evident that the index reading must have been mistaken, 1° 
for 0°. Sweep 8 examined ; the writing is clear and the reduction correct, but 
the conclusion from Mr. Mason’s observations is irresistible. 
4628 h. 2098=IV. 1. According to Lassell this is annular, an elliptic ring with a star 
in the centre. 
4654 h. 2113. Not seen by Lord Rosse; twice looked for. Examined sw. 86 (h.), in 
which it was observed. All found apparently correct, the observation clearly 
written and right reduced : and it is added, “ the double star ” (h. 934 in my 
“ 3rd series of observations, &c. &c.,” Mem. Ast. Soc. vol. iii.) “ is a good guide.” 
A diagram accompanying the observations, by indicating lines points out the 
relative situation of the double star and nebula. 
4710 h, 2133. Not seen by Lord Rosse in four observations. 
4714 h. 3897. Not found by Mr. Lassell within 30' all round the place. 
4723 h. 2137=111. 920. Not seen by Lord Rosse in one observation. 
4756 h. 2148. Not seen by Lord Rosse in three observations. In one a cloud passing. 
4775 h. 2156=111. 932. H. says, “just sf a S# to which it seems almost to be attached, 
but is free from it.” h. says, “ has a * 13m at a distance from the edge = 1 dia- ' 
meter by diagram.” Sw. 274 (h.). This sweep re-examined. The diagram makes ' 
the star north of the nebula. The description says, “Diagram certainly right.” 
4816 2172, a. In this group Lord Rosse has given only measures of relative position, ' 
