202 OBSERVATIONS ON NEBULAE 



straight. But with long attention, the irregularities represented in the figure 

 are prettj certainly made out. The narrow winding part differs in intensity 

 from the rest of the band too minutely to be at all represented in an engraving, 

 unless much exaggerated, as in Plate VI. The chief irregularities are at- 

 tended with little doubt, and are as follows : 



2. (Beginning at the upper end;) it bends outward so as to involve the 

 the bright star 176, fading off very diffusely in the concavity on the opposite 

 side. 



3. It forms an ill-defined, and scarcely complete loop around the stars 163, 

 165, 161, 159, 143, 128; it being faintest and most imperfect on its^ or np 

 side. It is at this point, that, in tracing the nebula from north to south, it first 

 begins to assume the remarkable peculiarity of interweaving with stars in 

 loops or network. (Art. 19, Aug. 10.) 



4: Turning from the bright stars 121 and 129, it bends, perhaps more than 

 in the drawing, towards the stars 146 and 160 on the following side, involving 

 the former and the pretty bright star 144 in its course. 



5. Bending back to the preceding side, it very nearly reaches, and per- 

 haps involves, the bright star 103. 



6. On the opposite side, it faintly diffuses itself to a considerable distance, 

 fading away nearly or quite as far as the stars 138 and 139; the space be- 

 tween these and 155, 134 being, however, quite vacant. 



7. After crossing the parallel of 30° 0', it soon grows brighter, and passes into 

 the bifurcate portion. 



8. (In the network portion.) A very faint loop, whose extremities are the 

 branches Nos. 11 and 15 of Art. 51, and which takes in its course No. 12 of 

 the same, is either "nearly certain " or "strongly suspected." Its course, be- 

 ginning from the south, is along the stars 174, 183, 184, 188, 189, 194, 191, 

 192, 180, and 177. 



9. The extension of branch No. 16 of Art. 51 as far as star 119. 



10. This branch also sends off a subdivision towards or along stars 145, 135, 

 132 and 127. 



11. The part of the v about the double triple star brightens up a little, 

 making a kind of feeble third nucleus with Nos. 1 and 2 of Art. 51. 



12. (In the bifurcate portion.) The broad s p division forks again into two, 

 one branch of which passes, as near as can be judged, over star 32, the other be- 



