STRANGER: The one kind is the conditional or co-operative, the other the

principal cause.

YOUNG SOCRATES: What do you mean?

STRANGER: The arts which do not manufacture the actual thing, but which

furnish the necessary tools for the manufacture, without which the

several arts could not fulfil their appointed work, are co-operative;

but those which make the things themselves are causal.

YOUNG SOCRATES: A very reasonable distinction.

STRANGER: Thus the arts which make spindles, combs, and other

instruments of the production of clothes, may be called co-operative,

and those which treat and fabricate the things themselves, causal.

YOUNG SOCRATES: Very true.

STRANGER: The arts of washing and mending, and the other preparatory

arts which belong to the causal class, and form a division of the

great art of adornment, may be all comprehended under what we call the

fuller's art.

YOUNG SOCRATES: Very good.

Statesman