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There are in a pound upwards of four thousand pins of a middling

size. Those ten persons, therefore, could make among them upwards

of forty-eight thousand pins in a day. Each person, therefore,

making a tenth part of forty-eight thousand pins, might be

considered as making four thousand eight hundred pins in a day.

But if they had all wrought separately and independently, and

without any of them having been educated to this peculiar

business, they certainly could not each of them have made twenty,

perhaps not one pin in a day; that is, certainly, not the two

hundred and fortieth, perhaps not the four thousand eight

hundredth, part of what they are at present capable of

performing, in consequence of a proper division and combination

of their different operations.