87. Money employed in cultivation, manufactures, or commerce, ought to produce more than the interest of money on loan.

The person who invests his money in land let to a solvent tenant, procures himself a revenue which gives him very little trouble in receiving, and which he may dispose of in the most agreeable manner, by indulging all his inclinations. There is a greater advantage in the purchase of this species of property, than of any other, since the possession of it is more guarded against accidents. We must therefore purchase a revenue in land at a higher price, and must content ourselves with a less revenue for an equal capital.

He who lends his money on interest, enjoys it still more peaceably and freely than the possessor of land, but the insolvency of his debtor may endanger the loss of his capital. He will not therefore content himself with an interest equal to the revenue of the land which he could buy with an equal capital. The interest of money lent, must consequently be larger than the revenue of an estate purchased with the same capital; for if the proprietor could find an estate to purchase of an equal income, he would prefer that.

By a like reason, money employed in agriculture, in manufactures, or in commerce, ought to produce a more considerable profit than the revenue of the same capital employed in the purchase of lands, or the interest of money on loan: for these undertakings, besides the capital advanced, requiring much care and labour, and if they were not more lucrative, it would be much better to secure an equal revenue, which might be enjoyed without labour. It is necessary then, that, besides the interest of the capital, the undertaker should draw every year a profit to recompence him for his care, his labour, his talents, the risque he runs, and to replace the wear and tear of that portion of his capital which he is obliged to invest in effects capable of receiving injury, and exposed to all kinds of accidents.