example) the sum of the repayments which it commonly receives from them is, or is not, fully equal to that of the advances which it commonly makes to them. If, within the course of such short periods, the sum of the repayments from certain customers is, upon most occasions, fully equal to that of the advances, it may safely continue to deal with such customers. Though the stream which is in this case continually running out from its coffers may be very large, that which is continually running into them must be at least equally large; so that without any further care or attention those coffers are likely to be always equally or very near equally full; and scarce ever to require any extraordinary expense to replenish them.

If, on the contrary, the sum of the repayments from certain other customers falls commonly very