Here, I am taking the funnel away----"
"Granted."
"Well, then, if by any method whatever I increase the volume of that
quantity of water by pouring in yet more through the mouth of the
little tube; the water thus compelled to flow downwards would rise in
the reservoir, represented by the flower-pot, until it reached the
same level at either end."
"That is quite clear," cried Raphael.
"But there is this difference," the other went on. "Suppose that the
thin column of water poured into the little vertical tube there exerts
a force equal, say, to a pound weight, for instance, its action will
be punctually communicated to the great body of the liquid, and will
be transmitted to every part of the surface represented by the water
in the flower-pot so that at the surface there will be a thousand
columns of water, every one pressing upwards as if they were impelled
by a force equal to that which compels the liquid to descend in the
vertical tube; and of necessity they reproduce here," said Planchette,
indicating to Raphael the top of the flower-pot, "the force introduced
over there, a thousand-fold," and the man of science pointed out to
the marquis the upright wooden pipe set in the clay.
"That is quite simple," said Raphael.
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