127 
An examination of the mean light-curve (a copy of which 
accompanies this communication) which was laid down from 
the co-ordinates resulting from a discussion of all the observa- 
tions I have obtained, yields the following results : — 
Mean magnitude at maximum 7 ‘77 
Mean magnitude at minimum ............... 13T4 
Mean range of variation 5 *37 magnitudes. 
Mean magnitude 10’32 
Interval from minimum to maximum ...... 66 *0 days. 
Interval from maximum to minimum 71*6 days. 
Interval from min. to mean mag 25*8 days. 
Interval from mean mag. to max. 40*2 days. 
Internal from max. to mean mag. 37*3 days. 
Interval from mean mag. to min 34*3 days. 
Interval from mean mag. before to mean 
mag. after maximum ............ 77*5 days. 
Interval from mean mag. before to mean 
mag. after minimum 59*1 days. 
An examination of the various results of observation and 
calculation given in the former part of this paper suggests the 
following general remarks. Like many other variable stars 
R Vulpeculse increases more rapidly than it decreases. The 
intervals between successive maxima and minima are subject 
to some little irregularity. And the observed magnitudes at 
maximum and minimum vary to the extent of some nine 
tenths of a magnitude. Still, as compared with some other 
stars, the movements of this variable must be regarded as 
tolerably regular. Although by no means so highly coloured 
as some variables, I have frequently noted the star in my 
observation book as 44 ruddy,” or 44 decidedly ruddy.” The 
maxima observable during the present year will fall, according 
to my own elements, on the following days: — July 17*0 and 
December 2*6. The observable minima will occur on May 
6*3 and September 20 8. 
