108 
THE YOUNG SCIENTIST. 
H. M. 
Alpha Lyrae (Vega) in merid 10 39 even 
Alpha Aquillse .Altair) in merid 11 51 " 
Alpha Cygni (Deneb) in merid 0 47 morn 
Alpha Pisces Australis (Formalhaut) 
rises 10 57 even 
EPHEMEKIDES OF THE VARIABLE STARS, EOR 
JULY, 1879. 
[Note.— That event which is visible is arways 
given.] 
Beta Persei (Algol). —Minima: 
July 7— 5h. 7m. morning. 
" 10— Hi. 55m. " 
" 12—10. 44m. evening. 
" 30— 3h. 35 m. morning. 
Delta JjIBUM.— Minima: 
July 2— llh. 8m. evening. 
" 9— llh. 43m. " 
"16— llh. 18m. " 
" 23— lOh. 53m. " 
" 30— lOh. 28ni. " 
All of these occur just prior to the setting of 
the star. 
U Conoid M.— Minima: 
July 24— 2h. 8m. morning. 
" 30— llh. 52m. evening. 
This star sets on the 24th, about 3h. 6m. morn- 
ing. 
spicuous, though large constellation. Above 
him, with head southward, stands Hercules, a 
large and rich constellation, having its northern 
part distinguished by a large trapezium of 
stars. The Nebulas 13 Messier, which we al- 
luded to last month, is near the northwest cor- 
ner of this trapezium. 
West of the Meridian.— The Zodiacal constel- 
lation. Libra and its Trapezium, and 35° north 
of it that beautiful cluster, the Northern Crown, 
easily distinguished by the crescent formed by 
six stars resembling a part of an inverted 
crown. Further west and in the Zodiac is 
Virgo, the " Nebulous Constellation," in which 
Sir William Herschel discovered 323 nebulge. 
The brilliant star Spica is on the right hand, and 
(if the observation be made about an hour ear- 
lier, while Kegulus is on the western horizon) 
will be found about midway between Eegulus 
and Antares. Arcturus, in Bootes, is northward 
from Spica, and a line joining them makes two 
right angles, with Kegulus on the west and 
Antares on the east. Berenice's Hair is a beau- 
tiful cluster nearly north of Spica. 
East of the Meridian.— About 20° above the 
southern horizon is the northern part of Sagit- 
tarius, the Archer, containing the inverted 
" Milk Dipper," with its handle pointing west- 
TjONG period 
Bate. 
Star's Name. 
B. A. 
July 1. 
THerculis. 
18h. 4m. 
" 2. 
R SagittsB. 
20h. 9m. 
" 10. 
R Bootis. 
14h. 31m. 
" 11. 
*S Scorpii. 
16h. 10m. 
11. 
R Ceti. 
2h. 20m. 
12. 
R Herculis. 
16h. Om. 
^' 15. 
S Geminorum. 
7h. 35m. 
" 16. 
S Vulpeculae. 
19h. 43m. 
17. 
T Hydrae. 
8h. 49m. 
22. 
U Virginis. 
12h. 45m. 
" 24. 
8 Librae. 
14h. 45m. 
" 30. 
V Cancri. 
8h. 14m. 
VARIABLES. 
Period in 
Change of 
Declination. 
Days. 
Magnitude. Phase. 
31° 0' + 
160 
7.9 to 13 maximum 
37° 39' + 
18 yrs. 
8 to 6 minimum 
27° 18' + 
196 
8 to 12 minimum 
22° 35' — 
364 
9 to 13 maximum 
1° 0' — 
168 
maximum 
18° 43' + 
310 
8.5 to 13.5 maximum 
23° 46' + 
294.07 
9.2 to 13.5 maximum 
27° 0' + 
(?) to 10.5 minimum 
8° 39' — 
292 or 226 
6.5 to 10.5 maximum 
6° 16' + 
212 
7.5 to 12 maximum 
11° 48' — 
8 to 9.5 maximum 
17° 41' + 
maximum 
situation of THE PRINCIPAL CONSTELLA- 
TIONS, CLUSTERS AND STARS JULY 15, 1879, 
9H. Om. EVENING. 
[Note.— The observer is supposed to be look- 
ing southward, and in Lat. 40° north.] 
Near the Meridian.— Low in the south is the 
TVIilky Way, branching about 10° above the 
horizon and bending eastward. The Scorpion 
is the first constellation, curling his long articu- 
lated tail about in the Milky Way, almost 
touching the horizon. Antares, a brilliant fiery 
Ted star, may be seen 25° up. Next northward 
is Ophiacus, the Serpent Bearer, a very incon- 
1 ward in the Milky Way. North of Sagittarius 
about 30° is Aquila, a small but interesting con- 
stellation, easily recognized by a line of three 
stars 3° apart, of which the central one is Altair, 
a splendid star of the 1^° magnitude. The line 
of these stars continued 35° northwest reaches 
Vega, a star ranked, by most astronomers, as 
next to Sirius in brilliancy. This star will, 
owing to the precession of the eqinoxes, become 
the polar star, some 10,000 years hence, and will 
be within 5° of the equinoctal pole. It will be a 
fine sight to see, the stars which will then be 
northern circumpolar circling about such a 
