Variation of L 6887 (Rh. Are) 83 
From this light curve, it would appear that all the light changes are 
performed in about twelve hours, the light remaining constant during 
the remaining four days. 
Confirmation of this important fact is much needed, for until the 
nature of variation is confirmed the facts here given are in the condi- 
tion of mere probabilities. 
As has already been said, the fact of its variation has been confirmed 
by four photographs taken in South America, but more important now 
is the confirmation of its right to be considered an Algol variable. The 
preceding light curve does not altogether settle the matter, as bias, 
personal error, and other sources of error, may have influenced, unin- 
tentionally and unwittingly, the result. 
Yet I think the probability is strongly in favour of this star being an 
Algol variable, inasmuch as there are few or almost no observations 
which indicate a steady increase and decrease, such as we have in most 
short-period variables. 
