This information is also given in B below. Here the emphasis is on the population movements to and from the farms. These two charts illustrate the technique of shading different sections of the same chart for different emphasis.

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LEAVING FARMS FOR CITIES AND VILLAGES

NET MOVEMENT TO FARMS

U S Department of ARriculture. Bureau of Auriculfural Economics.

B. Movement to and from Farms in the United States from 1920 to 1937.

The interest in this chart is centered on the number of people who came to the farms, causing an accumulation of farm population. As a result, the section labelled "arriving on farms" is shaded darker than the "net movement from farms."

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