ge
yellow, set against brilliant emerald green--is magnificent. There are
very few doubles that can be compared with it in this respect. The
three-inch will separate it, but the five-inch enables us best to enjoy
its beauty. It appears to be a binary, but the motion is very slow, and
nothing certain is yet known of its period.

In delta we have a very wide and easy double; magnitudes three and a
half and eight and a half, distance 110", p. 75 deg.. The smaller star has a
lilac hue. We can not hope with any of our instruments to see all of the
three stars contained in , but two of them are easily seen; magnitudes
four and seven, distance 108", p. 172 deg.. The smaller star is again
double; magnitudes seven and eight, distance 0.77", p. 88 deg.. It is
clearly a binary, with a long period. A six-inch telescope that could
separate this star at present would be indeed a treasure. Sigma 1926 is
another object rather beyond our powers, on account of the contrast of
magnitudes. These are six and eight and a half; distance 1.3", p. 256 deg..

Other doubles are: 44 (Sigma 1909), magnitudes five and six, distance
4.8", p. 240 deg.; 39 (Sigma 1890), magnitudes both nearly six, distance
3.6", p. 45 deg.. Smaller star light red; iota, magnitudes four and a half
and seven and a half, distance 38", p. 33 deg.; kappa, magnitudes five and a
half and eight, distance 12.7", p. 238 deg.. Some observers see a greenish
tinge in the light of the larger star, the smaller one being blue.

There are one or two interesting things to be seen in that part of Canes
Venatici which is represented on map No. 11. The first of these is the
star cluster 3936. This will reward a good look with the five-inch. With
large telescopes as many as one thousand stars have been discerned
packed within its globular outlines.

The star 25 (Sigma 1768) is a close binary with a period estimated at
one hundred and twenty-five years. The magnitudes are six and seven or
eight, distance about 1", p. 137 deg.. We may try for this with the
five-inch, and if we do not succeed in separating the stars we may hope
to do so some time, for the distance between them is increasing.

Although the nebula 3572 is a very wonderful object, we shall leave it
for another evening.

Eastward from Booetes shines the circlet of Corona Borealis, whose form
is so strikingly marked out by the stars that the most careless eye
perceives it at once. Although a very small constellation, it abound