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Of rainbows and rain (479. 480).
4
79.
The colours in the middle of the rainbow mingle together.
The bow in itself is not in the rain nor in the eye that sees it;
though it is generated by the rain, the sun, and the eye. The
rainbow is always seen by the eye that is between the rain and the
body of the sun; hence if the sun is in the East and the rain is in
the West it will appear on the rain in the West.
4
80.
When the air is condensed into rain it would produce a vacuum if the
rest of the air did not prevent this by filling its place, as it
does with a violent rush; and this is the wind which rises in the
summer time, accompanied by heavy rain.
Of flower seeds.
4
81.
All the flowers which turn towards the sun perfect their seeds; but
not the others; that is to say those which get only the reflection
of the sun.
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