Weekly national intelligencer. [volume] (Washington [D.C.]) 1841-1869, 1853-12-31

IN the major axis OF Its orbt is LOU; LOU luU- loo
100 is the distance spheres of the
first group. Then
Nv 66.G6.
The rotation of the earth its revolution is to COL.
Proof-The earth in it's orbit 644, 600 miles in
day The earth in rotation the length of its cir
conference in day, at its equator, 24sS4 miles.
lG6400o-..24s84 = G6oG.
By another method we divide the circumference of the
sun into the major axis Of the earths orbit
100, $50, O00-:- 273372O = 69.64.*
From 6964 deduct 1-o5th of 69.G4, TO wit, 2.79)
&c s5 Also l365th of G6.S5, Ito wit, 49, and the re-
mainder is 66.6G
Once more The suns circumference is ,, 720 miles.
Let the solar day stand unit and . 1873, 720 decmay
reduced is the difference between the solar and the side
realday the solar day in sidereal time is l0o27S3
For slight discrepancy in further decimals we can
account.
ROTATION OF THE Moon.
We have placed the rotary period Of the at u
hours and accordingly dnd the velocity Of the
ton Of the around the earth TO the velocity Of its
motion round the be $685. while the earth
rotation the earths revolution is as to 66.66.
The moon has rotation proper FOR rotation proper
is the circumference Of sphere turning around
within the sphere which the does not though the
act Of moving round the earth necessarily includes the
presentation Of every point in the circumference Of the
moon to q fxed start
We viii calculate the moons rotation by formula
Its major Of orbit round the earth is 63S miles
Its diameter is 260 miles It's period is 1887 times in
a year.
Az 63S = - "A
1237 2l9.74= .005G2 x 100 = SCI x 24...= $.2S
As the moon does not its axis the part Of the
urhest from the EARTH in moving round the EARTH
than the part Of the the the
earth BY f'cice The circumference Of the In every luna
ton this inequality occurs. There must be compensa-
tory or balancing motion.
This equalizng motion (which is the moons rotaon)
is the revolution Of the apsides Of the moons orbit
For twice the circumference Of the is contained
in its orbit l09.s7 times. The revolution of the moon
orbit is completed in, say, 100. 81 lunations.
The value Of this motion be readily calculated.
For twice the moons circumference is t6sS7 x 2 ~
10, ia miles; then "A sS4 miles he earths circum-
ference is to "a hours "a 70 IL the desired
The moons revolution Of the apsides Of its orbit
is 10 % hours w produced 1928 Los b. our formula
But why is the revolution Of the moons periree
1928 hours il it stands in place Of rotation having de-
duced the rotation Of the moon as 10 hours!
II man sails around the Earth while the earth Is
turning its axis be gains loses day according to
the direction in which he SO the moons orbit
by turning round the revoves gains one turn
| or l09S7 Of its amount every lunation.
This revolution Of the moons orbit is equivalent to
1923 hours; 1928 = 9.s7 say l2s; deduct ]. 2s
from II % -. hours.
By avery fractonally minute computation il can be
proved that the revolution Of the pergee exactly
equals l. hours agreeing with deduction by formula
for the rotation Of the moon in the second table
We have dwelt somewhat long the revolution Of the
orbit it calculates the nature OF axa ro
tation. We that the value Of this motion Of the
moon compensatory motion, is determined by trce
its circumference in its orbit.
so the a1ia rotation Of the planets is a compensatory
motion Without rotation the part Of the earth the fur
thest from the have the greater velocity 10 20
round the in the time. But by rotation every
particle composing the earth has motion the same
the motion Of the centre Of the earth in its annual re-
vouton Of course, then, formula is sound the 70
dry period Of the earth is determined by once its crcum
\ ference in It's orbit
| An objection will be made that we take the orbits Of
the planets circles, Of which the distances are
radii, not allowing for eccentricity Of orbit
This is easily answered there s only one element Of
696i includes the motion OF the earth in lunar spi
cycle which is l-25th Of its rotation.
For this reason the earth adds revolution on its
axis relatively the fixed stars-rotaiinQ G5 times
seen from the SUM- S66 times from the fixed stars
This difference one rotation in year. is what astrono
mers call the moons rotation It's sxis-one turn 10
revolution. (See Hopkins Geology
Think OF marble rolling round the edge OF an oval
table while the table s turning round in the same drec
ton you will that the motion Of the table an ad
dton 10 the motion Of the marble So the moon moves
about the earth ova! orbit and the oval orbit moves
ssnd.