Who cannot see the sophistry of this? Who does not see that cash is only a transient form, which men give at the time to other _values_, to real objects of usefulness, for the sole object of facilitating their arrangements? In the midst of social complications, the man who is in a condition to lend, scarcely ever has the exact thing which the borrower wants. James, it is true, has a plane; but, perhaps, William wants a saw. They cannot negotiate; the transaction favourable to both cannot take place, and then what happens? It happens that James first exchanges his plane for money; he lends the money to William, and William exchanges the money for a saw. The transaction is no longer a simple one; it is decomposed into two parts, as I explained above in speaking of exchange. But, for all that, it has not changed its nature; it still contains all the elements of a direct loan. James has still got rid of a tool which was useful to him; William has still received an instrument which perfects his work and increases his profits; there is still a service rendered by the lender, which entitles him to receive an equivalent service from the borrower; this just balance is not the less established by free mutual bargaining. The very natural obligation to restore at the end of the term the entire _value_, still constitutes the principle of the duration of interest. At the end of a year, says M. Thoré, will you find an additional crown in a bag of a hundred pounds? No, certainly, if the borrower puts the bag of one hundred pounds on the shelf. In such a case, neither the plane nor the sack of corn would reproduce themselves. But it is not for the sake of leaving the money in the bag, nor the plane on the hook, that they are borrowed. The plane is borrowed to be used, or the money to procure a plane. And if it is clearly proved that this tool enables the borrower to obtain profits which he would not have made without it, if it is proved that the lender has renounced creating for himself this excess of profits, we may understand how the stipulation of a part of this excess of profits in favour of the lender, is equitable and lawful.