-------------+-------------+--------+
| Delta Cepheids | June 20 | About 13[deg] from | | June 10-28, | |
| | | ([b]) Cassiopeiae | Sw. |July 19, Aug.| N. |
| | | | | 25, etc. | |
+--------------------+---------+--------------------+---------------+-------------+--------+

The Abbreviations under _Characteristics_ are as follows:

V.--very.
M.--moderately.
Sw.--swift.
Sl.--slow.
Sh.--short.
B.--bright.
F.--faint.
Sk.--streak-leaving meteors.
T.--train-leaving meteors.

THE CONSTELLATIONS OF SUMMER.

[Illustration: Maps showing the principal stars visible from Lat. 40[deg]
N. at 9 o'clock, July first.]

DRACO (dr[=a]'-ko)--THE DRAGON. (Face North.)

LOCATION.--About 10[deg] from [a] Ursae Majoris--from [a] to [d] is
10[deg]--slightly south of, that is above, the line from [a] to Polaris,
is Giansar, [l] in the tip of the Dragon's tail. Above [l], and almost
in line with it, are two more stars in Draco, which form with two
stars in Ursa Major a quadrilateral. (See diagram.) Draco now curves
sharply eastward, coiling about the Little Bear as shown, then turns
abruptly southerly, ending in a characteristic and clearly defined
group of four stars, forming an irregular square, representing the
Dragon's head. This group is almost overhead in the early evening in
summer. The star in the heel of Hercules lies just south of the
Dragon's head. The brilliant Vega will be seen about overhead, 12[deg]
southwest of the Dragon's head. Eltanin, one of the Dragon's eyes, is
noted for its connection with the discovery of the law of aberration
of light. It is of an orange hue, while the star [b], near it, is
white. Note Thuban, once the Pole Star, at one corner of a
quadrilateral that Draco forms with Ursa Major.

Thuban could be seen by day or night from the bottom of the central
passage of several of the Pyramids in Egypt.

The rising of Eltanin was visible about thirty-five hundred years B.C.
through the central passages of the temples of Hathor at Denderah. The
Egyptians called Draco "The Hippopotamus."

Vega and the four stars in the Dragon's head offer an opportunity to
compare the first five stellar magnitudes with which all should be
familiar.

[Illustration: DRACO]

LYRA (l[=i]'-ra)--THE LYRE.

LOCATION.--Lyra may be easily distinguished