Page:Philosophical Transactions - Volume 095.djvu/149

Rh 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.

A mean of these two means being 61$1⁄2$ days, agrees with the first deductions to 1$1⁄2$ 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.