THE YOUNG SCIENTIST. 
99 
Omicron Ceti (Mira) variable in 
Meridian 2 15 morn 
Beta Persei (Algol) variable in 
Meridian, 3 2" 
Ma Tauri (Alcyone or Light of 
Pleiades) in Meridian 3 40 " 
Alpha Tauri (Aldebaran) rises 9 29 even 
Alpha Aurigae (Capella) " 6 57 " 
.Be^a Orionis (Rigel) rises 11 36 " 
Alpha Orionis (Betelguese) rises 11 21 " 
Alpha Canis Majoris (Sirius or Dog 
Star) rises 1 41 morn 
AZp/ia Canis Minoris(Procyon) rises 1 16 " 
^/p/taLeonis (Eegulus) " 3 19 " 
Alpha Virginis (Spica) invisible. 
Alpha Bootis (Arcturus) sets 9 21 even 
J.^p/iaScorpionis(Antares)sets 8 41 " 
Alpha Lyrae (Vega) in merid. 6 32 " 
Alpha Aquillae (Altair) in merid. 7 44 " 
Alpha Cygni (Deneb) in merid. 8 36 " 
Alpha Pisces Australis (Fomalhaut) 
in meridian 10 49 " 
MOONS OF JUPITEE. 
The following are the more interesting phe- 
nomena which transpire at seasonable hours 
during the month of September, and are visible 
with any ordinary telescope or opera glass : 
D. 
H. 
M. 
Sat. I, 
1 
9 
28 eve.. 
Oe. 
Ee. 
" III, 
3 
9 
51 " 
Oc. 
Dis. 
" III, 
3 
11 
57 " 
Oc. 
Re. 
" II, 
7 
10 
19 " 
Oc- 
Ee. 
I, 
7 
11 
52 " 
Tr. 
In. 
I, 
8 
11 
12 " 
Oc. 
Ee. 
" I, 
9 
8 
30 " 
Tr. 
Eg. 
" III, 
10 
10 
23 " 
Ec. 
Dis. 
" II, 
14 
8 
50 " 
Ec. 
Dis. 
I, 
16 
8 
3 " 
Tr. 
In. 
I, 
16 
10 
15 " 
Tr. 
Eg. 
" III, 
21 
8 
33 " 
Tr. 
Eg. 
I, 
24 
9 
9 " 
Oc. 
Ee. 
Explanation :—0c., occultation, or passing 
behind the planet ; Tr., transit, or passing before 
or across the face of the planet ; Ec, eclipse, or 
passing into the planet's shadow. During this 
month the disappearances spoken of will all 
occur at the left or east of the planet as the 
shadow is thrown eastward. Dis., disappearance 
or beginning ; Eg., egress or ending. It will be 
interesting to watch the disappearance and fol- 
lowing reappearance of Sats. I and HI. The 
former, passing across the face of Jupiter, may 
be seen in transit as a black round spot, while 
the latter disappears entirely behind the planet, 
to reappear two hours later at the left. , 
THE MOON, V. 
A little west of the western termination of 
the Canal of Hyginus begins the Canal of 
Ariadeeus; it is larger, broader and probably 
deeper than the former, having been traced 
westward over 175 miles, or to the shore of 
the Sea of Tranquility. Both of these canals 
may be best seen about the First Quarter. 
Manilus (95) is a cavity 25 miles in diameter and 
7,700 feet deep ; its ring is broad, and capped with 
craters and high peaks. 99 and 101 are brilliant 
crater rings, and 96 and 98 are very dark hollows. 
Ehaeticus (104) is an irregular crater exactly on 
the Moon's equator. These complete all of the 
most conspicuous and interesting objects in the 
First .or Northwest Quadrant. 
SECOND OB N. E. QUADRANT. 
Near the crater Schroeter (106) have been seen 
what were supposed by some to be a work of 
art. The spot is indicated on the map by the 
fine lines below 106. The discoverer described 
them as a collection of dark gigantic walls, 
visible only when close to the terminator (the 
boundary between the light and dark portions) 
and extending 23 miles in each direction, being 
arranged on each side of a principal wall from 
which they slope off S. E. and S. W. respectively 
at an angle of 45°. N. is a bay where no craters 
are to be seen, with ordinary instruments, while 
upon its N. E. shore lie three grand craters, 
Eratosthenes (110), Stadius (111), and Copernicus 
(112). The first two are connected by a steep 
mountain range 4,500 feet high. The former is 
37 miles in diameter, and has a central hill, 
while the latter is 42 miles in diameter and is 
level. The ring of the first rises 16,000 feet 
above the inner surface, and the latter only 130 
feet, scarcely visible. East of 111 lies one of the 
grandest of lunar craters, Copernicus (112), 56 
miles in diameter. It has a central mountain 
that boasts of six heads, two of which are very 
conspicuous, a noble ring, made of terraces 
and distinct heights, separated by ravines. The 
nearly circular summit of the ring rises 11,000 
feet from the bottom (the height of ^tna). This 
crater forms a brilliant spectacle at the time of 
Full Moon, likened by some to a string of 50 
pearls. It is surrounded by radiating walls- 
lava streams. It is beautifully figured in " Out- 
lines of Astronomy," by Sir John F. W. Herschel, 
PI. V, Fig. 2. So said to be by Eev. T. W. Webb, 
in his "Celestial Objects," though the figure 
given in "Chamber's Astronomy," (after Nas- 
myth), PI. Ill, Fig. 29, bears no resemblance to 
it whatever. The figure in Herschel answers 
more nearly its appearance when viewed with 
an aperture of 3 or 4 inches, and a day or two 
after First Quarter. 
Penn Yan, JSf. Y. 
