, 1880-02-08

The moon sets this evening ut 5h- 60%m.
The new moon will occur Monday tomorrow
at Oh 27zn. a. m. Thursday morning the moo
will be near Jupiter. and Saturday morning nea
Saturn. Thursday evening she will be aboy1
Jupiter, and the next evening between Sat,1r
and the Square Of Pegasus
| Monday, SUMS upper Limb rises H. an a. m.
souths lin 2a-5s p. m. Sets 5h. o5Am- p. m.
Friday, sun's upper limb rises Oh. 5gm- g. n
souths lam. q is p. m. Sets 5h. 3Okm- pm
| 6tdereal time Thursday noon, 21h. Ism. 39.5Y
Mercury is ne ar the sun; to the westwa~7. IT:
| Superior Conjunction will occur next Saturday
| afternoon.
| Venus Is forming star. Thursday she rises
at 5h ON. a. m.; souths at Oh. 401n- g. NJ; nearly
three-fourths Of her disc Is Illuminated She il
now approaching the sun
Mars Is IN evening star. Thursday souths at
6h- Tim. P. NJ, and sets at H. 45m. the following
morning. About ntne-teuths Of his illuminated
disc Is turned toward us. He is near the Plei-
AIDES, and On Monday will be only two deeteea
south of that group OF stars
Jupiter is IN evening star. Thursday, sets at
n. Sim. p. m. He Is short distance south from
the square Of Pegasus
Saturn Is an evening star, nearly midway be-
tween the apparent places Of Mars and Jupiter.
and southeast from the Square OF Pegasus.
Thursday he souths at 3h- 19u and sets at Oh.
in. p. n The breadth Of his ring system fs
apparently about one-si1th OF its apparent d.
ameter.
Uranus souths Thursday at III o7m. a. m. He
Is Just visible to the naked eye In clear sky:
but not so favorably situated for evening obser-
vatfon as he will be month hence.
Neptune souths Thursday at 5h. I'm. D. m.
Right Ascension 2h. 30zu., and Deolination 1e
deg IS min north. He is invisible ercent
through q telescope
The middle star in the belt Of Orion souths at
en' ol1n Thursday evening; and Sirius will south
at Oh lin.
L comparison Of all the reported measures
that have been made OF arcs OF the earth's
meridian gives the following as the most prob
aole values OF the earth's dimensions:
Feet. MHes. Mtr<s
Polar radius. :. ..@.sss'so % ss9s.B s;s s,$5sI9
fas1o Eopar4hm 9f the o@ s@1es e 9aaee; e $685.
The eccentricity is one-twelfth, very nearly.
Value OF one degree On the equator, a53es
feet. Equatorial ircumference At sea.teTe1
s4@E miles; and circumference on meridian.
.4'e6o miles, very nearly. Surface On sea- |
level, 1856 93s, 900 square miles.
Inc circumstances Of the case scarcely war |
'ant the supposfhon that we can obtain a know1- |
.dge Of the eaxth's dimensions that may be de- |
pended upon as true to with one-mi1llonth part
y the whole. Probably one part in q hundred
snousaud IS nearer the limit OF ACCURACY.
The polar radius, as above given, is 1900 fnches
excess Of 250, go 900 inches, which is snrnoeed
o be the value OF 10, 100000 cubits of thu Ereot
Egyptian Pyramid. The Pyramld inch has been
tated to be equal to 1.ool British inch; it would
equire to be equal to l001o3 inch, in order tn
nake the above~given dimensions corresnond
nth the theory that the polar rnfi,,s ia os1 ~
% Pyramid inches. Tho nearness Of thia c,T,-
was first pointed nut bv tha 1a+.
IT J. F. ". Herschel, in 1863 as powerf,, ara,,e
lent against tho adoption Of the French. NO.
s unit OF measure, the metre being ~ as-.a. +,