E. S. HoMen—On supposed changes m Nebula M. 17. 345 



verschwindend kleiiien Stern oder ein Hauflein solcher Sterne 

 wahrzunehmen glaubte." 



In regard to the credence due to Lament's sketch the follow- 

 ing sentence is important (op. aV. p. 805) : "Was die . . . beige- 

 fugten Zeichnungen betrifft, so sind sie nur als Skizzen zu 

 betracbten, welche bios den Zweck haben, die Messungs- 

 resultate verstandlich zu machen." 



From Mason "s paper above cited : — 



''Things certain:—!. The 'resolvable knot' mentioned bj 

 Herschel is isolated or nearly so, from the rest of the nebula. 



2. The smaller knot is apparently not affected with this 

 peculiarity. 



3. Of the faint bend or loop [horseshoe] the following half 

 is brighter than the preceding. 



■4. The bright branch fades away gradually to the [east] ; it 

 is convex [towards the south.] 



5. The external angle of the n( 

 star [8] (of Lassell's nomenclaturi 



