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title: 'The Day book. (Chicago, Ill.) 1911-1917, April 08, 1914, NOON EDITION, Image 21',
meta: 'News about Chronicling America - RSS Feed',
Image provided by: University of Illinois at Urbana-Champaign Library, Urbana, IL
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THE LAND VOU WALK ON HAS TIDES! RISES
AND FALLS SAME AS OCEAN
' The earth "do" move!
The solid land has tides has a rise
and fall of the surface which we
tread just as the ocean has a rise and
This good old earth of ours is no
sponge no thing of flimsy material.
It is a mass so strong that its rigidity
is greater than that of a solid steel
ball of the same size!
Experiments now indicate that the
globe's itnerior is not a molten mass.
All these amazing discoveries have
recently been made by Prof. A. A.
Michelson and associates of the Uni
versity of Chicago.
Prof. Michelson is noted as the
winner of the Nobel prize for scienti
fic discoveries in light. To prove a
theory he had that the land has tides
as well -as the ocean, he established
an experiment station at Yerkes As
tronomical Observatory at Williams
Two ditches, each 500 feet long
and six feet deep, were dug. One of
the ditches extended directly north
and south and the other directly east
A pipe six inches in diameter and
500 feet long was filled half full of
water and placed in each ditch. The
Prof. Michelson and Yerkes Ob
servatory, where tidal ditches were
pipes and mechanism for measuring
the tides in the water were invented
by Prof. Michelson. The ditches were
filled with earth to insure constancy
At each end of the pipes a hole ten
feet deep was dug and an inclosed
concrete casement made, to which
the experimenters could descend and
ascertain the rise and fall of the
water level" with minutest precision.
This they did every hour, day and
night, for two months.
Michelson and his associates had
decided that surface land tides should
exist if the earth was absolutely rigid.
Tides were found in the water in the
pipes. It rose, and fell at regular in-