Evening star., 1929-06-30
Continued from Fifth Page.

lump forming on the earth is the same as
that involved in the classic example of the
sheep passing over bridge The trotting of
one sheep causes vibration in the bridge If
a large flock Of sheep were driven over the
bridge in perfect step. they would cause yibra-
ttcns strong enough to wreck the bridge.
so the earth became pear-shaped, the heavy
swelling becoming more pronounced as the years
passed. until 1t was finally thrown of as q
great blob Of material. II it went of as one
mass OF material. it is easy to understand how
it could retain its shape as a globule as 1t
spun on around the earth.
I'VE are assuming that this blob which was
cast OF was composed in the main Of the
crustal material with a smaller portion of the
heavier materials below the earth's crust And
how interesting that assumption becomes when
we study 1t in the light Of the density of the
moon today!
The astronomers and the geophysicists tell
us that the moon is probably made of exactly
the same materials which We find in the crust
OF the earth today. 1t is composed of the
crustal, or light, rocks. The density of this
crustal material on the earth is about three
times the density OF water, but the density of
the earth as a whole Is SIS. The density of
the moon is 3.3. Therefore it might seem
reasonable that the material which went into
the making of the moon was thrown of from
small portion of the heavier molten material
which would have gone with it, to account for
the slight increase in density of the moon as n
whole over the density OF the earth's crust
1t seems most reasonable to believe if we
VIII look at globe representing the surface
OF the earth, that the huge blob of the earth,s
crust which was thrown OF centered in the
region OF the South Pacific 1t is interesting
10 Imagine what happened after that material
went on and TO II the facts which We
already know about the earth and the moon
accord with the deductions"
MAJ. BOWIE pulled forward globe. which
was standing on his desk, and placed
his fingers In the middle of the wide expanse
OF blue representing the Pacific Ocean lust
below the Equator. Suppose we assume that
the huge portion of the crust was thrown on
from the earth just here" he said. when it
tore away naturally 1t left rough edges and
possibly broken fragments The Pacific is
dotted with numerous islands, particularly
around the edges of the Asiatic continent
which might have been bits Of crustal material
dropped back upon the heavier materials below
what was formerly the surface"
He turned the globe around to the Atlantic
side. Then 1t might seem that the remain-
ing crustal material as the earth continued to
spin was split and hoated apart over the still
molten interior" he explained
II we could shove the continents Of North
and South America southeastward they would
mt closely to the continents of Europe and
Africa. The rounded hump on Africa which
sticks out in the Atlantic might have once
ntted into the cavity followed out by the
Caribbean. Greenland might very nicely be
missing fragment between Northern Canada
and the Scandinavian Peninsula
There are also some other arguments in
favor OF the theory" Maj. Bowie explained
For instance, IL we take the figures repre-
senting the area of the oceans and multiply
them by 80 or 40 miles, the thickness Sf the
crust at the time OF disruption, we get a
result which represents in cubic miles aporoxi-
mately the volume OF the moon II khere
were any serious discrepancy In these two rptaIs.
1t would be hard to argue that the moon once
occupied the space on the earth now occ ,pied