shewed) about 4000 miles, now the plumb height of the highest
mountaines is not accounted aboue a mile and a halfe, or two
miles at the most. Now betweene two miles and foure thousand,
there is no sensible proportion, and a line that is foure
thousand and two miles long, will not seeme sensibly longer then
that which is foure thousand; as for example. Let (_O_) be the
center of the earth, (_XW_) a part of the circle of the earth
which runneth by the bottomes of the hils and superficies of
champion and even plaines (_WO_) or (_XO_) is the semidiamiter or
halfe the depth of the earth. (_S_) is a hill rising vp aboue
that plaine of the earth, (_WS_) is the plumb height of the hill.
I say that (_WS_) doth not sensibly alter the length of the line
(_OW_); for (_WS_) is but two miles. (_WO_) 4000 miles, and two
to 4000 alters not much more, then the breadth of a pinne to the
length of a pearch. So a line drawne from (_O_) the center to
(_S_) the top of the hill, is in a manner all one with a line
drawen to (_W_) the bottome of the hill.

[Illustration]

The third rule.

3 _The earth resteth immovable in the very midst of the whole
earth._

Two points are here to be demonstrated. _First that the earth
standeth exactly in the midst of the World. Secondly that it is
immoveable._ The former is proved by these reasons.

1 The naturall heavinesse of the earth and water is such, as they