of the variable Star in Sobieski’s Shield. 135 
From all these results it appears, that the disagreements 
between them are far greater when at its full brightness than 
at its least; I shall therefore, in summing up the first set, 
omit two of them, as they evidently differ considerably from 
the others. 
Table IV. 
Rotation from Observations of its 
Rotation from Observations of its 
full Brightness. 
least Brightness. 
Days. 
Days. 
57 
49 
6 9 
67 
65 
52 
6 1 — 
67 
67 — 
57i 
74 
50 
57+ 
5® 
72 
5 6 
65+ 
59 
By its least ditto 59 + on a mean. 
by its full brightness ®&+ on a mean. 
A mean of these two means being 6i± days, agrees with the 
first deductions to 1 ^ day, a coincidence that certainly I could 
not flatter myself would have happened : yet it must be re- 
membered, that the intervals with considerable perturbations 
were omitted; for, had they been included, the length of 
period resulting from its maxima of brightness would have 
varied much more from that obtained from its minima. I shall 
now proceed to examine some of its other changes. 
