24 
The place of 1773 for 1865 is 
H. M. S. 
R.A. 19 42 51 -6 
Dec. 26° 57 8*6" N. 
From some observations made with the 5 -inch achromatic 
in September, 1863, it appears that b was at that time at 
least three-tentlis of a magnitude less bright than a , which 
was then estimated to be of the same magnitude as at pre- 
sent. The variability of 1773 was discovered at the Royal 
Observatory, Greenwich, in 1837, by Messrs. Rogerson and 
Glaisher ; and as d was certainly invisible, or at least below 
the 14*5 magnitude in June, 1861, and c is now about half a 
magnitude less bright than it was at that time, while b on 
the other hand is a full half magnitude brighter than it was 
in September, 1863, we have here four variable stars within 
an area of little over one square minute, and it is to be 
remarked that the place of Anthelme’s new star of 1670 pre- 
cedes this singular and interesting group with a difference of 
right ascension of only about 48 seconds. 
