210 



OBSERVATIONS ON NEBULiE 



hitherto has not been much noticed, and can, indeed, only be perceived by instruments that collect a great 

 quantity of light. 



*jl 'P ^r» ^ T* ^P T* 'r* ^f*- "T^ 



The description of the object I shall select is of No. 14 in the 5th class, and is as follows s : — " Extremely 

 faint branching nebulosity; its whitishness is entirely of the milky kind, and it is brighter in three or four 

 places than in the rest; the stars of the milky way are scattered over it in the same manner as over the 

 rest of the heavens. Its extent in the parallel is nearly 1^ degree, and in the meridional direction about 

 52 minutes. The following part of it is divided into several streams and windings, which, after separating, 

 meet each other again towards the south." See figure 1. 



Sir J. F. W. Herschel. " Observations of Nehulm and Clusters of Stars, made at Slough, with a 

 twenty feet Reflector, 6fc" Phil. Trans. 1833, Part II. 



No. 



2092 



2093 



Synonym. 



A. R. 1830.0 



V. 14 



201^ 49" 19^.1 



Nova. 



22.7 



20 50 4.4 



N. P. D. 1830.0 



58° 57' 1" 



60 26 6 y 



Desciipiion and Remarks. 



Place of the southern and brightest star of a trape- 

 zium south of the bifurcation of this nebula. The 

 nebula is extremely faint, very long, and strag- 

 gling, extending at least four fields (= 1°) '. Its 

 direction is (by diagram) about 20° n p to s f, 

 and near the middle it forks into two chief 

 branches. (See fig. 34.) In the trapezium (or 

 oval) above spoken of are 6 stars, 1 = 11 m; 

 2 = 10m; 3 = 12m; 4 = ]4m; 5 = 15m; 6 = 

 12 m °. The northern branch of the fork is the 

 principal", and passes south of a double star^' 

 (7)". 



The same star in the same nebula V. 14. The 

 nebula is of great extent, passing obliquely 

 through and rather under (to the north* of) a 

 small constellation, being densest where under 

 it; but it is extremely faint, and only to be seen 

 with an eye well prepared, and in a very clear 

 night. The whole neighbourhood seems affect- 

 ed with wisps, or cirro-stratus-like masses of ne- 

 bula.^ 



(See figure 82.) A most wonderful phenomenon. 

 A very large space, 20' or 30' broad in P. D., 

 and 1'" or 2'" in R. A., full of nebula and stars 

 mixed. The nebula is decidedly attached to the 

 stars, and is as decidedly not stellar. It forms 

 irregular lace-work marked out by stars, but 

 some parts are decidedly nebulous, wherein no 

 stars can be seen.^ A figure (from which the 

 drawing for the engraving was copied) repre- 

 sents general character, but not the minute de- 

 tails of this object, which would be extremely 

 difficult to give with any degree of fidelity. 



Sweep. 



199 



198 



s Art. 64. t Certainly over-estimated, even by the testimony of his own drawing. 



" It is not so in his drawing. Also, see Art. 51. 17; Art. 52. 12. v Art. 52. 14. 



w I cannot conjecture to what this '■' (7) " refers. t Art. 19, Aug. 19; Art. 54. 4. y Art. 65. 



^ Art. 19, Aug. 1 and 9; Art. 51. 8, 13. 

 ^ There seems to be an erratum here in the Phil. Trans. For " to the s. of," read " to the n. of." 



