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

B. Population in the United States by Size of "Conrimunity" from 1890 to 1930.

1. Each incorporated place is a separate "community." The use of a heavy line to represent the total emphasizes the fact that the lines below it arc merely divisions.

2. See 93 A4.

COMPONENT PARTS SHOWN BY CURVES

MILLIONS OF PERSONS

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1929 1930 I9?i I9?2 19?? I9M 1935 19)6 I9?7 19^8

U. S. Dfpartmcnt of Commfrcc. Division of Economic Resrarch, "Survfy of Current Business," July 1938.

A, Total Non-Agricul+ural Employment in the United States from 1929 to 1938.

1. When the labels for the various sections of a component-part curve chart are indicated

within the section, an attempt should be made to keep the labels on a horizontal plane.

2. Note the position of the label for the "total" line.

Dun's Rrview. August 1938

B. Percentage Distribution of Strike Issues in the United States from 1927 to 1937.

The 100% band chart is similar in principle to the charts which contain a series of 100% bars. See 102B.

GRAPHIC PRESENTATION

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