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135

of the variable Star in Sobieski's Shield.

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 full Brightness.	Rotation from Observations of its least Brightness.
Days.	Days.
57	49
69	67
65	52
61—	67
67—	74
571/2	50
57+	56
72	56
	65+
by its full brightness 63+ on a mean.	611/2
	59

	by its least ditto 593/4 on a mean.

A mean of these two means being 611/2 days, agrees with the first deductions to 11/4 day, a coincidence that certainly I could not flatter myself would have happened: yet it must be remembered, 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.

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