Evening journal., 1899-07-01
The SKIES IN JULY.
Many Observations Made BY
Means of Photography.

CALCULATIONS AS TO ITS RISING
AND sETTING-soMEFHING OF.
INTEREST ABOUT THE NEW
PLANET ERos-THE HANGING
LAMP.
In the course Of the month of July
the moon will pass through her phases,
as follows. New on the 7th, first quar-
Ter on the 18TH full on the 22d, and last
quarter on the 29th On the 10th she
will be in apogee and on the 23d in
perigee. Since the 2lst of June the
sun has been slowly moving southwark.
on the list of July IL will be 23 degrees
z minutes 70 seconds. and on the last a
little over is degrees l6 minutes "A
seconds north OF the equator traversing
during ihe month an arc OF @ little over
8 degrees. The exact position OF the
sun north and south OF the equator, or,
to use technical term. its doclination
enters into so many astronomical COM
putations. and is OF so great an inn
portance that the Nautical Almanac
gives it for every day in the year with
a correction for every hour. The prob
lem involving the calculation of tla
suns rising and setting, consequently
the lengths of the days and
nights. of the points of the
suns rising and setting on the horizon
of the time when the sun will begin
and cease to shine on the north and
south walls Of buildings. Of the length
Of twilight, all Of these and many more
requires a knowledge of the declina-
tion, and it becomes, therefore, Of great
importance to compute it with great
accuracy. and to lay down the result.
in that book SO indispensable to tho
mariner and the almanac makeps-thS
Nautical Almanac which is prepared
under the direction of the professors OF
the United States Navy. Tor many
years this important work has been di-
rected by that fine mathematician and
astronomer, Professor Simon New
comb, to whom the great perfection o.
the American Nautical Almanac is
chiefly due.
While Mercury will be in Gemini a
the beginning Of the month, it viii be il
Leo at its end. Venus will at first b
at Taurus, but later in Gemini Risinl
between and o'clock in the morning
She will shine as morning star and b.
visible for some time even after tn
morning twilight has considerably ad
vanced. Mars is still in Leo. At tn
beginning Of the month this plant vii
set about 1890 in the evening, and tc
ward its termination an hour sooner
As soon as the first magnitude stars be
come visible Mars may be seen a littl
less than midway between the merida
and the Western horizon. conspicuou
by its intense redners. Jupiter is sti
lingering in Virgo. quite closely
Spica, the most conspicuous star in thi
constellation. This beautiful plan
will be visible as evening star uni
about midnight Saturn is Ia Sagitta
ius and not very far from a portion
Ophiuchus. a constellation TO be
scribed farther on. This planet will
on the meridian at about o o'cioc
'ranus is in scorpio and Neptune
surus. but on account Of their IL
onse distance they are not visible
ae naked eye, though a very keen e
may catch a glimpse Of Uranus on
cloudless and moonless night
The correlation Of sciences has
come especially manifest in the cs
Of astronomy. the astonishing achie'
1aents Of which within this century {
principally due TO the marvellous d
coveries in Che physical and chemi
sciences. the greater perfection
ematical methods and the appli