la. At present the star is very
faint and can only be seen with the most powerful telescopes. Compare
with the case of Nova Aurigae, previously discussed.

Underneath Cygnus we notice the small constellation Vulpecula. It
contains a few objects worthy of attention, the first being the nebula
4532, the "dumb-bell nebula" of Lord Rosse. With the four-inch, and
better with the five-inch, we are able to perceive that it consists of
two close-lying tufts of misty light. Many stars surround it, and large
telescopes show them scattered between the two main masses of the
nebula. The Lick photographs show that its structure is spiral. The star
11 points out the place where a new star of the third magnitude appeared
in 1670. Sigma 2695 is a close double, magnitudes six and eight,
distance 0.96", p. 78 deg..

[Illustration: MAP NO. 18.]

We turn to map No. 18, and, beginning at the western end of the
constellation Aquarius, we find the variable T, which ranges between
magnitudes seven and thirteen in a period of about two hundred and three
days. Its near neighbor Sigma 2729 is a very close double, beyond the
separating power of our five-inch, the magnitudes being six and seven,
distance 0.6", p. 176 deg.. Sigma 2745, also known as 12 Aquarii, is a good
double for the three-inch. Its magnitudes are six and eight, distance
2.8", p. 190 deg.. In zeta we discover a beauty. It is a slow binary of
magnitudes four and four, distance 3.1", p. 321 deg.. According to some
observers both stars have a greenish tinge. The star 41 is a wider
double, magnitudes six and eight, distance 5", p. 115 deg., colors yellow
and blue. The uncommon stellar contrast of white with light garnet is
exhibited by tau, magnitudes six and nine, distance 27", p. 115 deg.. Yellow
and blue occur again conspicuously in psi, magnitudes four and a half
and eight and a half, distance 50", p. 310 deg.. Rose and emerald have been
recorded as the colors exhibited in Sigma 2998, whose magnitudes are
five and seven, distance 1.3", p. 346 deg..

The variables S and R are both red. The former ranges between magnitudes
eight and twelve, period two hundred and eighty days, and the latter
between magnitudes six and eleven, period about three hundred and ninety
days.

The nebula 4628 is Rosse's "Saturn nebula," so called because with his
great telescope it presented the appearance of a nebulous model of the
planet Saturn. With our five-inch we see it simply as a planetary
neb