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502, that they are enabled to keep their rate of profit above the general level. A trade may also, from the nature of the case, be confined to so few hands, that profits may admit of being kept up by a combination among the dealers. It is well known that even among so numerous a body as the London booksellers, this sort of combination long continued to exist. I have already mentioned the case of the gas and water companies.

§ 4.After due allowance is made for these various causes of inequality, namely, differences in the risk or agreeableness of different employments, and natural or artificial monopolies; the rate of profit on capital in all employments tends to an equality. Such is the proposition usually laid down by political economists, and under proper explanations it is true.

That portion of profit which is properly interest, and which forms the real remuneration for abstinence, is strictly the same, at the same time and place, whatever be the employment. The rate of interest on equally good security, does not vary according to the destination of the principal, though it does vary from time to time very much, according to the circumstances of the market. There is no employment in which, in the present state of industry, competition is so active and incessant as in the lending and borrowing of money. All persons in business are occasionally, and most of them constantly, borrowers: while all persons not in business, who possess monied property, are lenders. Between these two great bodies there is a numerous, keen, and intelligent class of middlemen, composed of bankers, stockbrokers, discount brokers, and others, alive to the slightest breath of probable gain. The smallest circumstance, or the most transient impression on the public mind, which tends to an increase or diminution of the demand for loans either at the time or prospectively, operates immediately on the rate of interest: and circumstances in the general state of trade,