the art of making shuttles is subsidiary to the art of weaving or in that in which the art of casting bronze is subsidiary to the making of statues (for the two are not subsidiary in the same way, but shuttlemaking supplies tools whereas bronze-founding supplies material—and by material I mean the substance out of which certain work is produced, for example fleeces are material for a weaver and bronze for a statuary). 2 Now it is clear that wealth-getting is not the same art as household management,