The surface of
water or other liquid is always
any sphere is the less is its convexity.
Hence the top diameter of any
vessel at the summit of a mountain will form the base of the segment of
greater sphere than it would at the bottom.
This sphere, being
must (from what has been already said) be less convex; or, in other
words, the spherical surface of the water must be less above the brim
the vessel, and consequently it will hold less at the top of a mountain
than at the bottom.
The reader is
therefore free to select any
he likes in Italy—or elsewhere!