| 793 | 794 | 795 | 796 | 797 |
| 1 | 306 | 613 | 919 | 1225 |
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[3] If two rivers meet together to form a straight line, and then
below two right angles take their course together, the flow and ebb
will happen now in one river and now in the other above their
confluence, and principally if the outlet for their united volume is
no swifter than when they were separate. Here occur 4 instances.
[Footnote: The first two lines of this passage have already been
given as No. 957. In the margin, near line 3 of this passage, the
text given as No. 919 is written.]
On the alterations, caused in the courses of rivers by their
confluence (972-974).
9
72.
When a smaller river pours its waters into a larger one, and that
larger one flows from the opposite direction, the course of the
smaller river will bend up against the approach of the larger river;
and this happens because, when the larger river fills up all its bed
with water, it makes an eddy in front of the mouth of the other
river, and so carries the water poured in by the smaller river with
its own. When the smaller river pours its waters into the larger
one, which runs across the current at the mouth of the smaller
river, its waters will bend with the downward movement of the larger
river. [Footnote: In the original sketches the word Arno is
written at the spot here marked A, at R. Rifredi, and at M.
795
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