55 
The mean of the two values of the period is 67*92 days. The 
interval, from minimum to maximum brightnesses 30*8 days, 
and from maximum to minimum 37T days. This variable, 
therefore, like many others, increases in brightness more 
rapidly than it diminishes. Its magnitude at maximum is 
8*8 and at minimum 9*8, the range of variation being, there- 
fore, one magnitude. It is one of the highly-coloured stars, 
both Mr. Hind and myself having always noted it as being 
very red . 
Mr. Baxendell also communicated the following u Obser- 
vations of the Greenwich Yariable in Vulpecula and its 
Companion Stars. By George Knott, Esq., F.R.A.S.. of 
Woodcroft Observatory, Cuckfield, Sussex. 5 ’ 
1864, Nov. 5. — I have this evening examined the Green- 
wich Variable in Vulpecula and its neighbours. The state of 
the atmosphere was not by any means favourable, and I could 
not make out c; but a , 5 , and d were well in view, and b 
decidedly the greatest of the three. I inclined to estimate b 
about 12 \ magnitude ; and by the method of reduced aper- 
tures I found 
a=12*8 mag. *£=13*0 mag. 
5=12*6 „ 1773= 9*1 „ 
The star 1773 is the Greenwich variable ; and d is the new 
star] announced by Mr. Baxendell in his communication in 
the Society’s Proceedings, No. 2, Session 1864-5. 
Nov. 22. — I secured a hasty, and therefore comparatively 
valueless observation. After a hasty glance clouds came up, 
and I could not gauge the magnitudes as I was preparing to 
do. My rough results were — 
a— 13*0 mag. c , invisible. 
5—12*9 mag. J=13*2 mag. 
Nov. 26. — On this evening I entered in my journal — 
“ 5, 12*9 ; a , 13*0 ; 13*2. Is there a minute speck at e?” 
