890 ME. W. HUGGINS ON THE SPECTRA OF SOME OF THE NEBULA, 



SpectiTim continuous. 



[No. 4244. 50 H. IV. R.A. 16'' 43" 6»-4. N.P.D. 42° 8' 38" -8. Very bright; large, 

 round ; disk + faint, barely resolvable, border.] 



"Eine kleine Nebelsheibe, hell=-X-9 Gr., umgeben von einer merklich schwachem 

 Nebelhiille ; kreisrund 1' diam. Ruhiges Licht, blaulich." — D'Arrest*. 



Spectrum continuous. No appearance of bright lines when the slit was made narrow. 



[No. 4266. 10 M. R.A. le*" 49™ 47''-6. N.P.D. 93° 52' 6"-8. Cluster; bright; well 

 resolved.] 



" The most important stars take a spiral arrangement." — Lord OxMANTOWif. 



Spectrum continuous. 



[No. 4315. 14 M. R.A. 17'' 30™ 16«. N.P.D. 93° 9' 25". Cluster; bright; well 

 resolved.] 



Spectrum continuous. 



[No. 4357. 3719 h. 199 H. II. R.A. 17" 54™ 13'-9. N.P.D. 98° 56' 37"-3. Pretty 

 bright ; pretty large ; round ; partially resolved.] 



Spectrum of the central, brighter part of the nebula continuous. As far as the light 

 permitted, the marginal portion of the nebula was also examined, and appeared to give 

 a continuous spectrum. 



[No.4437.2019h. IIM. R.A.18H3™37'-2. N.P.D. 96°26' 7"-6. Quster; very bright.] 



" Stars curiously broken up into groups." — Lord Oxmantown. 



The continuous spectra of all the brighter stars of this cluster were separately visible. 

 When the clockwork of the equatoreal was stopped, an interesting spectacle was pre- 

 sented by the flashing in rapid succession of the linear spectra of the minute stars of the 

 cluster as they passed before the slit. 



In no part of the cluster was any trace of bright lines detected f. 



[No. 4441. 3762 h. 47 H. I. R.A. 18'' 45™ 29«-2. N.PD. 98° 52' 8"-5. Quster; well 

 resolved.] 



Spectrum continuous. 



[No. 4473. Auw. N. 44. R.A. 19'' 4™ 4^-8. N.P.D. 89° 11' 51". Pretty bright^.] 



Spectrum continuous. 



[No. 4485. 2036 h. 56 M. R.A. 19''ll"'7«-2. N.P.D. 60°3'41"-6. Ouster; bright; 

 well resolved.] 



Spectrum continuous. Suspicion of unusual brightness in the middle part of the 

 spectrum. 



* Beobachtungen der Nebelflecken tind Stemhaufen, p. 341. 



t This absence of any indication of gaseous matter is in accordance with telescopic observation. D'Arrest 

 remarks of this cluster, " Mit Verg. 11 zerfallt der Stemhauf in deutlich gesonderte gruppen mit leeren 

 zwischenraumen." — Beobach. der Nebelflecken und Stemhaufen, p. 346. 



Lord RossE observes : — " In such objects as clusters we find no new feature ; nothing which had not been 

 seen with instruments of inferior power." — Philosophical Transactions, 1844, p. 322. 



X " This is the nebula discovered by Mr. Hind on March 30, 1845. It was observed in May 1852 as a 

 nebula of the first class ; subsequently as ' pretty faint and diluted.' M. Auwers found it ' surprisingly faint,' 

 and of the second class at the highest." — Philosophical Transactions, 1864, p. 38. 



