12. Particles of light and simple ideas of colour.
Whether then they be globules or no; or whether they have a
verticity about their own centres that produces the idea of whiteness in us; this is certain, that the more particles of
light are reflected from a body, fitted to give them that peculiar motion which produces the sensation of whiteness
in us; and possibly too, the quicker that peculiar motion is,--the whiter does the body appear from which the
greatest number are reflected, as is evident in the same piece of paper put in the sunbeams, in the shade, and in a
dark hole; in each of which it will produce in us the idea of whiteness in far different degrees.
