Modes of motion answer those of
extension; swift and slow are two different ideas of motion, the
measures whereof are made of the distances of time and space put
together; so they are complex ideas, comprehending time and space with
motion.
3. Modes of sounds. The like variety have we in sounds. Every
articulate word is a different modification of sound; by which we
see that, from the sense of hearing, by such modifications, the mind
may be furnished with distinct ideas, to almost an infinite number.
Sounds also, besides the distinct cries of birds and beasts, are
modified by diversity of notes of different length put together, which
make that complex idea called a tune, which a musician may have in his
mind when he hears or makes no sound at all, by reflecting on the
ideas of those sounds, so put together silently in his own fancy.
4. Modes of colours. Those of colours are also very various: some we
take notice of as the different degrees, or as they were termed
shades, of the same colour. But since we very seldom make
assemblages of colours, either for use or delight, but figure is taken
in also, and has its part in it, as in painting, weaving, needleworks,
&c.; those which are taken notice of do most commonly belong to
mixed modes, as being made up of ideas of divers kinds, viz. figure
and colour, such as beauty, rainbow, &c.
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