III.
SUBTERRANEAN WATER COURSES.
Theory of the circulation of the waters (961. 962).
961.
Very large rivers flow under ground.
962.
This is meant to represent the earth cut through in the middle,
showing the depths of the sea and of the earth; the waters start
from the bottom of the seas, and ramifying through the earth they
rise to the summits of the mountains, flowing back by the rivers and
returning to the sea.
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