Observations in support of the hypothesis (963-969).
963.
The waters circulate with constant motion from the utmost depths of
the sea to the highest summits of the mountains, not obeying the
nature of heavy matter; and in this case it acts as does the blood
of animals which is always moving from the sea of the heart and
flows to the top of their heads; and here it is that veins burst--as
one may see when a vein bursts in the nose, that all the blood from
below rises to the level of the burst vein. When the water rushes
out of a burst vein in the earth it obeys the nature of other things
heavier than the air, whence it always seeks the lowest places. [7]
These waters traverse the body of the earth with infinite
ramifications.
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