178 Observations of Nebula and Clusters of Stars. 
G. C. | h. & H. | a 
5049 2300= | 1848, Dec. 22. 2 stars (or one * and Nucl.) steadily seen, 3 or 4 others 
II, 227 sparkling through it. 
1849, Sept. 10. 2 S st near middle, bay running across it, longitudinal streaki- 
ness suspected. 
1851, Noy. 24. Esp nf, S * about 30” sp centre. 
1855, Oct. 7. No Nucl, 2 st seen steadily and I suspect a * or knot in nf branch. 
The centre of neb looks darker than the rest. 
1855, Oct. 8. Not quite so well seen. There certainly exists a dark bay in 
centre of neb between the two stars. (XIV. obs.) 
6239 wr 1872, Oct. 26. Nova f 2" 57°:0 and’ 2’ 327-5 n of 5042 (2 measures), eF, L. 
Position for 1860-0 23" 57’ 11%-4, 59° 18’ 15”-0. 
1875, Oct. 5. 3" £5042 ane F, L, diffused neb was seen. Clouds. (II. obs.) 
5050 2301 1851, Aug. 24. S lenticular neb. 
1875, Sept. 10. Found with some difficulty, is certainly not “pB, mE,” but 
F, S, R, sbM to a starlike Nucl. * 14m + sp, about 45” Dist. [agrees with 
dA]. (II. obs.) 
5051 2302 1850, Sept. 9. Not found, past zenith a good way which caused a change in 
index error. 
1850, Oct. 11. Not found. I saw a red * perhaps 12th mag at this set, nearly 
same RA. (LI. obs.) 
5054 2304 1875, Sept. 10. p one eF,e 8, * 15 m nf; f one is v F, v 8, * 12m. Pos. 
5056 2306 77° -6, Dist. 86-9. 
1877, Nov. 27. 5056 is pF, pS, R, * 12°13m 12’ f. 5054 is 5’ p, a little fainter. 
Clouds. (II. obs.) 
OMITTED OBSERVATION. 
5066 Peer. 1873, Dec. 26. F,8,m E 153°-3, a ray binuclear. Four stars 10}mf. Red 
* 9m. Pos. 105°-9 (2), Dist. 427-5 (2). [NPD is 69° and not 65° as in 
the G. C. There is, however, no remark about this in the original observa- 
tion.| (1. obs.) 
eee eee eee SS ———— — —————————————— 
In the paper in the Philosophical Transactions for 1861 (p. 145) is given a “List of Nebule not 
found,” comprising 35 objects. Two or three of these are stars believed by Sir John Herschel to be 
<‘nebulous” (such as h. 162), and some objects are doubtless non-existing. Of the others, 17 have been 
observed by d’Arrest, who, iv the “ Astronomische Nachrichten” (No. 1500), as also in his great work 
on Nebule, remarks that it is strange that these objects should have escaped the attention of the 
observers at Parsonstown. However, as up to about ten years ago there were no graduations for 
indicating the hour angle of the 6-foot telescope at any moment, an inconspicuous nebula could well 
have occasionally been searched for in vain, as the observer, when once off the meridian, was unable 
accurately to judge how far the instrument had been moved. During late years the graduations upon 
the cross bar have enabled the observer to re-set the instrument two or three times, and thorqughly 
search the required spot. 
The objects in the above-mentioned list observed by d’Arrest, but not looked for of late with the 
6-foot, we have passed over in silence, but where d’Arrest agrees with us as to the non-visibility of an 
object the fact has been noted. The cases (h. 284, 314, 333, 546, 577, 578, 745, 1307, 1535, 1832, 
2073, and 2250) of nebule formerly not found at Birr Castle, but observed by us after 1861, as also 
those never found by us, and not looked for by any one else after the two Herschels, have been mentioned 
in their proper places. 
