THE NEBULA ABOUT e ORIONIS. 93 



telescope, on the very edge of the following side, at the bottom 

 of the Sinus Magnus, and is pretty closely preceded by No. 26, 

 of the seventeenth magnitude, within the bright part. I do not 

 find that star No. 27 has been noticed before ; but when once 

 caught sight of, there will be no great difficulty in judging of its 

 situation in regard to the nebula, as it may be steadily seen. 

 No. 27 will bear illuminated wires. 



There is a great diminution of light in the interior of the 

 Trapezium, but no suspicion of a star. 



The connection of the main body of the nebula with that 

 portion which surrounds C Orionis is traced by the north-pre- 

 ceding route. It is quite decided ; the nebulous light condenses 

 strongly about C and C^ ; indeed, the majority of the stars in 

 this neighbourhood are nebulous. C is closely double : this, I 

 believe, has not been noticed before. 



No. 68 is also to me a new double star, the distance less than 

 a second. The light terminates abruptly on the following side 

 of C^. The star No. 54, with its companion No. 52, of the thir- 

 teenth magnitude, are both enveloped by the nebula. I notice 

 that, in Sir John Herschel's figure, the light does not reach 

 either of tliese two stars. 



There is nebulous light yet farther north ; but as, at the time, 

 I did not succeed in tracing the connection, I have not included 

 it in my drawings ; neither does the light of C Orionis connect 

 on the following side with the extensive fields about No. 92. 



South of the double star No. 91, which is situated near the 

 termination of the Messierian branch, the light spreads in the 

 south-preceding direction, maintaining the cirrous character of the 

 branch. I was unable to satisfy myself how far it might be 

 possible to trace it southward, but certainly beyond Iota. Soon 

 after passing this star, it, however, becomes very faint. 



