or geometrical solidity.

5. The sense of sight gives rise to ideas of extension, of figure,
magnitude, and motion.

6. The sense of sight does not give rise to the idea of "outness,"
in the sense of distance in the third dimension, nor to that of
geometrical solidity, no visual idea appearing to be without the mind,
or at any distance off (§§ 43, 50).

7. The sense of sight does not give rise to the idea of mechanical
solidity.

8. There is no likeness whatever between the tactile ideas called
extension, figure, magnitude, and motion, and the visual ideas which
go by the same names; nor are any ideas common to the two senses.

9. When we think we see objects at a distance, what really happens
is that the visual picture suggests that the object seen has tangible
distance; we confound the strong belief in the tangible distance of
the object with actual sight of its distance.

10. Visual ideas, therefore, constitute a kind of language, by which
we are informed of the tactile ideas which will, or may, arise in us.

Taking these propositions into consideration _seriatim_, it may be
assumed that everyone will assent to the first and second; and that
for the third and fourth we have only to include the muscular sense
tinder the name of sense of touch, as Berkeley did, in order to make
it quite accurate. Nor is it intelligible to me that anyone should