however, will see it as a double (see Plate 3). [delta] Monocerotis is
an easy double, yellow and lavender.

We may now leave the region covered by the map and take a survey of the
heavens for some objects well seen at this season.

Towards the south-east, high up above the horizon, we see the twin-stars
Castor and Pollux. The upper is Castor, the finest double star visible
in the northern heavens. The components are nearly equal and rather more
than 5" apart (see Plate 3). Both are white according to the best
observers, but the smaller is thought by some to be slightly greenish.

Pollux is a coarse but fine triple star (in large instruments multiple).
The components orange, grey, and lilac.

There are many other fine objects in Gemini, but we pass to Cancer.

The fine cluster Præsepe in Cancer may easily be found as it is
distinctly visible to the naked eye in the position shown in Plate 1,
Map I. In the telescope it is seen as shown in Plate 3.

The star [iota] Cancri is a wide double, the colours orange and blue.

Procyon, the first-magnitude star between Præsepe and Sirius, is finely
coloured--yellow with a distant orange companion, which appears to be
variable.

Below the Twins, almost in a line with them, is the star [alpha] Hydræ,
called Al Fard, or "the Solitary One." It is a 2nd magnitude variable. I
mention it, however, not on its own account, but as a guide to the fine