they are made to stand for; insomuch that a man born blind and
afterwards made to see, would not, at first sight, think the
things he saw to be without his mind or at any distance from
him."

The key-note of the Essay to which Berkeley refers in this passage is
to be found in an italicized paragraph of section 127:--

"_The extensions; figures, and motions perceived by sight are
specifically distinct from the ideas of touch called by the
same names; nor is there any such thing as an idea, or kind of
idea, common to both senses_."

It will be observed that this proposition expressly declares that
extension, figure, and motion, and consequently distance, are
immediately perceived by sight as well as by touch; but that visual
distance, extension, figure, and motion, are totally different in
quality from the ideas of the same name obtained through the sense
of touch. And other passages leave no doubt that such was Berkeley's
meaning. Thus in the 112th section of the same Essay, he carefully
defines the two kinds of distance, one visual, the other tangible:--

"By the distance between any two points nothing more is meant
than the number of intermediate points. If the given points
are visible, the distance between them is marked out by the
number of interjacent visible points; if they are tangible,
the distance between, them is a line consisting of tangible
points."

Again, there are two sorts of magnitude or extension:--