I have already been to see a great variety (of atmospheric effects).
And lately over Milan towards Lago Maggiore I saw a cloud in the
form of an immense mountain full of rifts of glowing light, because
the rays of the sun, which was already close to the horizon and red,
tinged the cloud with its own hue. And this cloud attracted to it
all the little clouds that were near while the large one did not
move from its place; thus it retained on its summit the reflection
of the sunlight till an hour and a half after sunset, so immensely
large was it; and about two hours after sunset such a violent wind
arose, that it was really tremendous and unheard of.

[Footnote: _di arie_ is wanting in the original but may safely be
inserted in the context, as the formation of clouds is under
discussion before this text.]