4. Corn and wheat exports of fifty years, 1825 to 1875.-The light space on the right of the diagram represents the volume of wheat, the darker shade the flour in its equivalent of bushels of wheat. On the left corn in bushels is shown, and the darker stripe gives the equivalent of the corn-meal exports. It will be seen that the first half of the period is credited with less than a fifth of the wheat exports; and that the aggregate of the last quarter of the period is equal to the total shipment of the preceding three-fourths. A striking feature of the diagram is the remarkable increase in the export of whole wheat. For many years scarcely an appreciable quantity, it increases slowly at first, rapidly after 1860, and at the close of 1875 it nearly equaled the aggregate of wheat exports in the form of flour.

The value of wheat exports for each half decade is thus given in detail:

The corn and corn-meal exported are equivalent to the following aggregate of bushels of corn:

The value of corn and corn-meal, represented in connection with wheat in the second figure of the diagram, is as follows for the several periods: