Ill 
I have not observed S Coronse when at its minimum 
brightness, and cannot therefore give the lower limit of its 
range of variation, nor the interval from minimum to maxi- 
mum. My observations show, however, that it belongs to 
the list of variables which increase in brightness more rapidly 
than they diminish. Thus in 1864 it rose through 4*5 
magnitudes in 78 days, but fell through only 1*5 magnitudes 
in 80 days ; and in 1865 it increased 5*3 magnitudes in 106 
days, but diminished only 2 0 magnitudes in 118 days. 
The place of S Coronse for 1865*0 is 15 h. 15 m. 546 s. 
4-31° 51*2'. The calculated time of its next maximum is 1866, 
July 17 ; and for the convenience of observers who may be 
disposed to watch its changes and record their observations, 
I append to this communication a small chart, and a list of 
comparison stars with their magnitudes. 
XV. hours. 
14 m. 16 m. 18 m. 
| + 31° 20' 
4- 31° 40- 
4- 32° 0^ 
4- 32° 20' 
14 m. 16 m. 18 m. 
MAGNITUDES OF COMPAKISON STABS. 
a = 6-8 d= 8-6 0 = 11*3 
6 = 7-9 e = 8-8 A= 11-9 
c = 8-2 /= 10-2 *= 12-6 
