Principles of economics.International trade.Principles of economics.Wages and capital. An examination of the wages fund doctrine.Free trade, the tariff and reciprocity.The history of the present tariff 1860-1883.Principles of economics.Some aspects of the tariff question.The tariff history of the United States.The silver situation in the United States.Some aspects of the tariff question : an exmination of the development of American industries under protection /