o 



80 Cluster and Nebulce. 



been diligently gazing at a spot 90° distant. It was but just 

 steadily visible, but showed itself in the full presence of its 

 blazing companion, so that it may be fairly inferred that this 

 telescope reaches 17, at any rate, of the 20 magnitudes 

 grasped by the 1 8-inch front view of H.'s metallic mirror. 

 It may be mentioned that this speculum, which, however fine, 

 can at any time be equalled, if not surpassed, by its truly 

 successful maker, shows a black division, with 450, between 

 the components of 7 2 Andromeclce, and, with a low power, traces 

 for a long distance both of the remarkable " canals," or rifts, 

 in the Great Nebula in the same constellation (Int. Obs., 

 iv. 347). 



While in this neighbourhood, we may look with a low 

 power about f ° / fi, where we shall find a deep orange single 

 star, and a pretty open pair s of it, all of about 7 magni- 

 tude. 



CLUSTEE AND NEBULA. 



46. — 4575 Gen. Cat. (y. viii. 56) is a charming group of 

 stars of various sizes, to be found |° n of <y Gygni, a little /. 

 H. saw it 5' long, 3' broad, and counted forty stars, two 7.8 

 mag., the rest 11 mag. In another observation he speaks of 

 stragglers 10-16 mag. 



47. — 218 Gen. Cat. This curiously-placed and readily found 

 nebula is in the field with (3 Andromedce, a very strong yellow 

 (Y 2 ) star ; it lies at a short distance nj), and is very easily seen 

 in my reflector. H. calls it pretty bright, considerably large, 

 gradually brighter in the middle. 



A more singular object awaits us at no great distance, 

 which we shall point out by the intersection of two straight 

 lines, one drawn from <y Andromedce, to 7 (the central star) in 

 Gassiopea, the other from /3 Androm., to the glorious cluster 

 in the Sword Hand of Perseus: near the point of their crossing 

 are two 4 mag. stars, 2° apart j the further n of these is 

 <f> Persei, and 1° n of this is the nebula we are going to 

 describe. 



48.-385, 386 Gen. Cat. (M. 76). This is not a very con- 

 spicuous object with ordinary instruments, though it was 

 "very bright " in ^'s reflectors; but its most remarkable 

 feature is its double character, consisting evidently of two 

 closely-connected lobes, and resembling a good deal the 

 "Dumb-bell" in miniature, at least as that object was com- 

 monly figured before it came under more careful review. It 

 has been examined by Huggins, with the following truly 

 curious result : — " Both parts of this double nebula give a 

 gaseous spectrum" (as is the case with the Dumb-bell nebula). 



