AKD A SELECTION FEOM THE OBSEEVATIONS MADE WITH THEM. 745 
List of Nebulae not found. 
Nvunber in 
Herscliel’s 
Catalogue. 
Number of 
times 
looked for. 
Observations. 
Number in 
Herschel’s 
Catalogue. 
Number of 
times 
looked for. 
Observations. 
57 
1 
672 
1 
162 
8 
706 
6 
184 
1 
745 
1 
206 
1 
828 
1 
281 
1 
1307 
1 
284 
2 
One night passing clouds. 
1485 
2 
Once sky hazy. 
314 
1 
Clouds passing. 
1535 
1 
Clouds passing. 
333 
1 
1832 
1 
343 
7 
1948 
1 
4 / 
Twice, a slight milkiness 
1974 
1 
ooo 
" 1 
suspected. 
2062 
1 
401 
9 
2073 
2 
468 
5 
No nebulosity seen. 
2113 
2 
546 \ 
2133 
4 
577/ 
1 
2137 
1 
578 
1 
2148 
3 
Once clouds passing. 
590 
1 
2250 
4 
669 
1 
2302 
2 
This is not to be considered as a list of missing nebulae, but merely of objects which 
were not found in the ordinary course of observing, and to which therefore it is desirable 
that attention should be directed. They have not been looked for since this list was 
made out. 
The engravings of the Nebulae are extremely faithful ; there is, however, a slight 
inaccuracy which it is necessary to notice, and for which we are to blame, not the 
engraver. Many of the principal stars are too large. The error arose in this way. The 
stars were inserted in common, not Indian ink, and, the drawings during their transmis- 
sion by post becoming slightly damp, the ink made its way into the paper, the dots in 
some cases becoming small blots. In a few instances it was necessary to set this right 
to prevent misconception, and some alteration was in consequence made in the Plates ; 
but as to the remainder, w'e thought it sufficient to state the fact generally, that many 
of the principal stars were somewhat too large. This remark applies especially to 
figures I and 3, Plate XXV., and to figures 24, 28, 29, 30, 34, Plate XXVIII. 
