Britain's exports in the 1850's were mainly the results of her industrial revolution; they were nearly all finished manufactures. two-thirds of them being either textiles or wrought iron products. Their physical volume. in the Exhibition year. were just about four times as great as it had been a generation before. In exchange for them. the United Kingdom got mainly raw materials. especially the materials for its textile industries-foods tufTs were as yet not of such great importance. In short. international trade was expanding at a great rate mainly because of the industrialization of the United Kingdom (and. to a smaller extent. of France. Belgium. and Germany). and consisted largely of an exchange of manufactured goods for raw materials and. to a smaller extent. for foodstuffs.