The star [kappa] Bootis is not so wide a double (see Plate 5), the magnitudes of the components 5 and 8, their colours white and faint blue--a beautiful object.
The star [xi] Bootis is an exceedingly interesting object.

It is double, the colours of the components being orange-yellow and ruddy purple, their magnitudes 3-1/2 and 6-1/2.

When this star was first observed by Herschel in 1780 the position of the components was quite different from that presented in Plate 5.

They were also much closer, being separated by a distance of less than 3-1/2 seconds.

Since that time the smaller component has traversed nearly a full quadrant, its distance from its primary first increasing, till in 1831 the stars were nearly 7-1/2 seconds apart, and thence slowly diminishing, so that at present the stars are less than 5 seconds apart.