Like figures are round figures with round, and irregular and triangular with those of the same kind.

These falling upon the ears produce the sense of hearing.

This is seen in leaking vessels, and in fullers when they fan or blow their cloths.
Democritus, that the air is broken into bodies of similar configuration, and these are rolled up and down with the fragments of the voice; as it is proverbially said, One daw lights with another, or, God always brings like to like.

Thus we see upon the seashore, that stones like to one another are found in the same place, in one place the long-shaped, in another the round are seen.

So in sieves, things of the same form meet together, but those that are different are divided; as pulse and beans falling from the same sieve are separated one from another.