ner of the Great Square is found by drawing a line
from Polaris to Cassiopeia, and prolonging it an equal distance.

The Great Square is a stellar landmark. Three of the corners of the
square are marked by stars in Pegasus; the fourth, and northeastern,
corner is marked by the star Alpheratz in Andromeda. Each side of the
square is about 18[deg] long.

The horse is generally seen upside down, with his fore feet projected
up into the sky. Only the head, neck, and fore feet are represented.
The star Enif marks the nose.

[p] is an interesting double, easily seen in an opera-glass. All the
stars of the Square are approaching us at an inconceivable speed.

The position of the asterism Equus or Equ[=u]leus, the Little Horse,
or Horse's Head, is shown in the diagram.

Delphinus, the water jar of Aquarius, and the circlet in the Western
Fish, are all in the vicinity of Pegasus, and indicated in the
diagram.

The winged horse is found on coins of Corinth 500 to 430 B.C. The
Greeks called this constellation [Greek: hippos].

Pegasus seems to have been regarded in Phoenicia and Egypt as the sky
emblem of a ship.

Within the area of the Square Argelander counted thirty naked-eye
stars.

Note a fine pair in Equ[=u]leus just west of the star Enif in Pegasus.

The position of the equinoctial colure is defined by a line connecting
Polaris, [b] Cassiopeiae, [a] Andromedae, and [g] Pegasi.

[Illustration: PEGASUS]

ANDROMEDA (an-drom'-e-d[:a])--THE CHAINED LADY.

LOCATION.--The star [a] Alpheratz is at the northeastern corner of the
great square of Pegasus, one of the stellar landmarks.

Running east from [a], at almost equal distances, are four other
stars, two of which are of the second magnitude. The most easterly one
is [b] Persei, known as Algol, the famous variable. Lines connecting
the stars [g] Andromedae, Algol, and [a] Persei form a right-angled
triangle. The right angle is marked by Algol.

The chief object of interest in this constellation is the great
nebula, the first to be discovered. It can be seen by the naked eye
and it is a fine sight in an opera-glass. Its location is indicated in
the diagram.

The star [g] is the radiant point of the Bielid meteors, looked for in
November. It is a colored double visible in a 3" glass.

The great nebula has been called the "Queen of the Nebulae." It is said
to have been known as far back as A.D. 905, and it was described 986
A.D. as the "Little Cloud."