Excerpts from the Letter of Submittal: The values of crops in any single year would not be just as a record of comparative values, because of the great variation in quantity from year to year; therefore the average of ten consecutive years is made the basis of comparison, securing an absolutely fair result, for which no data can be found except in the annual estimates of values of farm products of this Department, which are accepted as the most accurate and reliable of the work of our crop reporters. The series includes ten maps, each illustrating values of a single crop, by States, the whole comprising the entire list of farm products for which annual estimates in detail of area and rate of yield and value have been made. The following is the List of Illustrations: I. Corn, values and yields per acre. II. Wheat, values and yields per acre. III. Oats, values and yields per acre. IV. Rye, values and yields per acre. V. Barley, values and yields per acre. VI. Buckwheat, values and yields per acre. VII. Potatoes, values and yields per acre. VIII. Tobacco, values and yields per acre. IX. Cotton, values and yields per acre. X. Hay, values and yields per acre.