The technique of putting the detail for the last year under a magnifying glass is good.

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WPA ,Tnd Bureau of ARricuIturnl Economics. 'Rur.nl Poverty." 1038. SCALE .7

B. Prices Paid and Prices Received by Farmers in the United States 1910-1937. For Prices Paid the Average Year August 1 910- 1 9 14 Equals 100%. For Prices Received the Average Year August 1909-1914 Equals 100%.

Since the chronoloRical scale from 1910 to 1937 is by years and the scale for 1937 is by months, the latter is presented as if it were a separate chart. Compare this with 304A and 285C.

INDEX NUMBERS SHOWN BY CURVES

•((.LIONS V OOLLAM

TOTAL EXPORTS

"The Federal Chart Book," Prepared by Central Statistical Board and National Resources Committee. January 1938. SCALE .7

Total Exports and Imports of the United States Compared with the Index of Physical Volume of Exports from 1919 to 1937.

1. To add meaning to numerical values, a comparison with index numbers is often useful.

The insertion of the small index number chart in the space at the upper right shows one method of accomplishing this.

2. Note the method of breaking the grid to indicate an omission of a period of years.

3. See 93 A4.

GRAPHIC PRESENTATION

WPA. and Burrau of Acncultural Economics. "Rural Poverty." l')38. A. Trends of Expenditures for Relief in the United States fronn 1932 to December 1936.