Observations of 500 Nebulae. 



81 



Rem. The dimensions estimated by h, D'A and Sf inconsiderably Gr than 

 those here indicated — but H has: 8' lg and 3' br; R: 10' lg. 



U550 a most indistinct and diffuse object, not to be exactly determined; hardly Br 

 than CI. Ill, yet sky v dull; neby E ur in the par sp to nf; C eondens scarcely 

 perceptible; a multitude of eF momentarily glimmering through the neby. S 

 d of «... p. 



Rem. In SN I find the following description according with my obs: "neb. 

 ex iis est, quae accuratam et perfectam loci determinationem non admittant, earn 

 ex innumeris stellulis, admodum imbecillis, esse compositam, palam et apertum", 

 and also ''est sublustris classis sexta3." It is consequently v surprising, that h 

 and R say nothing of the r. R has only : "an amorphous mass of neby, of 

 uneven character." Even H has not seen the object resolved, though he has 

 hypothetically "easily r." 



h557 rr; * 10™ np and * 9 m 10 ( = BB.21° 1976) sf; r probably yet more conspicuous, if 

 the v troublesome B *... did not exist. 



Rem. R says nothing of the r, and, as far as I know, it has been before 

 remarked only by D'A: "dissolvitur, et quidem nitide et aperte." 



h565: * 12'"13 p ab 2' s; r suspected, could not be decided on account of less favou- 

 rable atmospherical circumstances; h has "r". Comp even SN! 



Ii56i Gr and Br than h593; only seen in bright moonlight. 



h566 rr; diam ab i / a '. 



GC.1775 searched for in vain 1870 March 27 and 29; neby suspected nf h566, but 

 nothing sure. Also not seen by D'A. 



h567 rr; not Gr than '/V; vvF and scarcely observable; d* (12 m ; 12 m 13) np. 



Rem. According to the Upsala-obs both neb have many fine *... glimme- 

 ring through the neby, and r is especially evident in h566. H has also "r" at 

 111.826 = h 567 ; but h, R and D'A say nothing of r of these objects. 



h568 is according to GC "cB", yet not found 1869 Jan. 18; not obs either by R or DA. 



GC. 17 92 = D'A Nova, similar to yet Fr than 1x578; evidently visible but not obser- 

 vable in moonlight. 



h578: * 9 m 10 ( = BB.20°2299) p 3 n; * 10 m 1' ./ n from that *; nr in the par of the 

 neb al d* f, the s component ll m , possibly both *... inv in neby? Not to be de- 

 cided in moonlight. 



h584 a trifle Br than h530; diam perhaps 1'; * 11™ np. 



11.57,58 and GC.1846 carefully but in vain searched for 1866 Apr. 5 and 6. The 

 R neb suspected, but probably too F for the Upsala-refractor — not indicated 

 in SN. The first two neb have not been reobserved since the time of H — 

 are they spurious and identical with h597 and h598? 

 Nova Acta Reg. Soc. Sc. Ups. Ser. III. 11 



