The post. [volume] (Middleburg, Snyder County, Pa.) 1864-1883, 1878-05-02
THE ORIGIN OF The TIDES

All bodies attract each other; the pow
or OF the force exerted depending up
on the weight of tho bodies aud theil
distance from each other The weight
of any body is in fact the force with
which the earth attracts that body 60
ltaelf Tho celestial bodies aro all
chained together by this force Of NJ
traction. Tho sun and moon both
exert an attractive influence on the
earth, inducing our planuot TO ap-
proach to them this attraction be-
ing countcrbalanccl by the ccntrifug
nj forcc, we describe u curve, which i.
the resultant of those two forces.
l'ut tho surface OF the earth consists
Of fluid aud solid; the former, owing
10 its mobility, oxibits u greater ten
dslcy to ohoy tho attractive iniu-
encc, aud therefore rises to meet
tho sun and moon. Tho sun,on nc,
count Of his enormous bulk. exorcis..
es n much greater attractive force
than the moon, but tho solar tide is
much less than the lunar tide, for
this rcason--that tho moon being
near tho earth, attracts tho surface
of the sea far more than its solid
bed, and, therefore, tho water rises
in "A honp underneath the satellite.
Tho sun, OIL the other hand being 50
distant exerts nearly rs puch force
on tho surface rs on tho ocean bed
beneath, and, there fore, lifts up
tho water but very little, Tho ilcn-
tically same effect is produced upon
that part of tho earth most distant
from tho sun or moon, only in this
case tho ocean bed is drawn toward
those bodies moro rapidly than the
water, which is in fact. loft behind.
when the sun anl moon aro either in
conjunction or opposition-that 10,
when the line joining them passes in
the neighbJrhood of, o. directly
through tho oarth-theu, their at
tractyo forces being united, the IT,
dal wave will ba at maximum,
forming "spring tides" If they be in
"quadrlturo that, il, il tho lines
drawn from right orglo-thon the
tides will b3 NJ u minimum. of "neap
tide" will result. IL will DO evident
then, luat if the earth were n world
OF waters, each tidal wave would pass
completely round the earth III tWen.
four hours The existence OF cOn-
tinonts materially moditi,s its transit
aud it is driven from it's course nnl
consequently retarded. The great
tidal wave takes its rise in tho deep
Antarctic ocean. As il trrgcrses Tho
ocean the water is not raiscu move
a ipw feat pat when IL ente. q
shallow sea, or an estuary, whore
tho iide finds its.lfiu sort Of fun
mel, then tho rise is sometimes as
much rs seventy feet, as is the oase
iu the Bay Of Fundy. Tho wayo is
not q wave of transmission, but one
Of motion, an il tho particles Of
water were destitute Of cohesion
or friction among themselves they
woul | only iilo into tho samo place
a'tJr tho attraction had passed a
wave of this nature is illustrated b.
throwing u stouo into II pond; the
wayolots expand from tho point of
disturbance, but do not carry to the
shore anything that floats ON tho
surface of tho water such bodies on
~ arising as it were to allow tho
wavo TO pass beneath them this
proves that the water had only ups
ward and downward movement as it
formed the wave.
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The temperance causo has its tri'
umphs like every other great reform.
A mau who ia ovor 100 years Of ago
has just signed tho pledge, AMI be~
-, Va