horizon. Turning to the south, we see high up above the horizon the
square of Pegasus. Low down towards the south-south-west is Fomalhaut,
pointed to by [beta] and [alpha] Pegasi. Towards the west, about
half-way between the zenith and the horizon, is the noble cross in
Cygnus; below which, towards the left, we see Altair, and his companions
[beta] and [gamma] Aquilæ: while towards the right we see the brilliant
Vega.

During this half-hour we shall not confine ourselves to any particular
region of the heavens, but sweep the most conveniently situated
constellations.

[Illustration: PLATE V.]

First, however, we should recommend the observer to try and get a good
view of the great nebula in Andromeda, which is _not_ conveniently
situated for observation, but is so high that after a little trouble the
observer may expect a more distinct view than in the previous quarter.
He will see [beta] Andromedæ towards the south-east, about 18° from the
zenith, [mu] and [nu] nearly in a line towards the zenith, and the
nebula about half-way between [beta] and the zenith.

With a similar object it will be well to take another view of the great
cluster in Perseus, about 18° from the zenith towards the
east-north-east (_see_ the pointers [gamma] and [delta] Cassiopeiæ in
Map 4, Frontispiece), the cluster being between [delta] Cassiopeiæ and
[alpha] Persei.

Not very far off is the wonderful variable Algol, now due east, and
about 58° above the horizon. The variability of this celebrated object