Customs duties of every sort are of course superfluous.
A nation simply does not import what its government does not think requisite for the general interest.

Each nation has a bureau of foreign exchange, which manages its trading.

For example, the American bureau, estimating such and such quantities of French goods necessary to America for a given year, sends the order to the French bureau, which in turn sends its order to our bureau.

The same is done mutually by all the nations." "But how are the prices of foreign goods settled, since there is no competition ?" "The price at which one nation supplies another with goods," replied Dr.Leete, "must be that at which it supplies its own citizens.

So you see there is no danger of misunderstanding.