As a merchant who has a hundred and ten thousand pounds worth of wine in his cellar is a richer man than he who has only a hundred thousand pounds worth of tobacco in his warehouse, so is he likewise a richer man than he who has only a hundred thousand pounds worth of gold in his coffers. He can put into motion a greater quantity of industry, and give revenue, maintenance, and employment to a greater number of people than either of the other two. But the capital of the country is equal to the capitals of all its different inhabitants, and the quantity of industry which can be annually maintained in it is equal to what all those different capitals can maintain. Both the capital of the country, therefore, and the quantity of industry which can be annually maintained in it, must generally be augmented by this exchange.