[epsilon]^{1}, the other [epsilon]^{2}. Seen as a double, both
components appear white.

Now, if the observer's telescope is sufficiently powerful, each of the
components may be seen to be itself double. First try [epsilon]^{1}, the
northern pair. The line joining the components is directed as shown in
Plate 3. The distance between them is 3"·2, their magnitudes 5 and
6-1/2, and their colours yellow and ruddy. If the observer succeeds in
seeing [epsilon]^{1} fairly divided, he will probably not fail in
detecting the duplicity of [epsilon]^{2}, though this is a rather closer
pair, the distance between the components being only 2"·6. The
magnitudes are 5 and 5-1/2, both being white. Between [epsilon]^{1} and
[epsilon]^{2} are three faint stars, possibly forming with the quadruple
a single system.

Let us next turn to the third star of the equilateral triangle mentioned
above--viz. to the star [zeta] Lyræ. This is a splendid but easy double.
It is figured in Plate 3, but it must be noticed that the figure of
[zeta] and the other nine small figures are not drawn on the same scale
as [epsilon] Lyræ. The actual distance between the components of [zeta]
Lyra is 44", or about one-fourth of the distance separating
[epsilon]^{1} from [epsilon]^{2}. The components of [zeta] are very
nearly equal in magnitude, in colour topaz and green, the topaz
component being estimated as of the fifth magnitude, the green component
intermediate between the fifth and sixth magnitudes.

We may now turn to a star not figured in the map, but readily found. It
will be noticed that the stars [epsilon], [alpha], [beta], and [gamma]
form, with two small stars towards the left, a somewhat regular
hexagonal figure--a hexagon, in fact, having three equal long sides and