not because this or that figurated surface is more proper, natural, or
peculiar to one of these fluid bodies, then to the other, will appear from
this; that the same _fluids_ will by being put into differing _solids_,
change their _surfaces_. For the same water, which in a Glass or wooden
Vessel will have a concave surface upwards, and will rise higher in a
smaller then a greater Pipe, the same water, I say, in the same Pipes
greased over or oyled, will produce quite contrary effects; for it will
have a _protuberant_ and _convex_ surface upwards, and will not rise so
high in small, as in bigger Pipes: Nay, in the very same solid Vessel, you
may make the very same two contiguous _Liquids_ to alter their Surfaces;
for taking a small Wine-glass, or such like Vessel, and pouring water
gently into it, you shall perceive the _surface_ of the water all the way
_concave_, till it rise even with the top, when you shall find it (if you
gently and carefully pour in more) to grow very _protuberant_ and _convex_;
the reason of which is plain, for that the _solid_ sides of the containing
body are no longer extended, to which the water does more readily adhere
then the air; but it is henceforth to be included with air, which would
reduce it into a _hemisphere_, but by reason of its _gravity_, it is
flatted into an _Oval_. _Quicksilver_ also which to _Glass_ is more
incongruous then _Air_ (and thereby being put into a _Glass-pipe_, will not
adhere to it, but by the more _congruous air_ will be forced to have a very
_protuberant_ surface, and to rise higher in a greater then a lesser Pipe)
this _Quicksilver_ to clean _Metal_, especially to _Gold_, _Silver_, _Tin_,
_Lead_, &c. _Iron_ excepted, is more _congruous_ then _Air_, and will not
only stick to it, but have a _concave_ Surface like _water_, and rise
higher in a less, then in a greater Pipe.

In all these Examples it is evident, that there is an _extraordinary_ and
_adventitious force_, by which the _globular_ Figure of the contained
_heterogeneous_ fluid is altered; neither can it be imagined, how it should