The method of reading tfiis chart is as follows: according to the 1930 census about 42% of male gainful workers were in the manufacturing and mechanical industries. In 1934 about 52% of the men on relief designated manufacturing and mechanical industries as their former place of employment. This latter fact does not seem so startling in view of the first statement.

Chapter 17 AREA BAR CHARTS

THE BASIS of comparison in an area bar chart is the area of the bar rather than the length of the bar. Other terms appHed to this type of chart are, 100% square; 100% block.

M CXNTt Nl HCMM

AVIMAM BUIIIIIiga IN CINIt ff« MOU*

AVCMASC FOa AU TYKt

KKSKT Of TOTAL HOUK OH WMKM MTMCKT WAS tAUD lOO % s I, *7*, 000,000 HOUM

WPA. "Report on Progrpss of the Worki Program." December 1937.

Average Hourly Earnings of Persons Ennployed on Works Progress Administration Projects, by Types of Projects for the Period from January through October 1937.

1. As both the percentage of the total number of hours and the earnings per hour are

given, it is possible to compute from this chart the actual amount of expenditure for each type of project.

2. The chart indicates without computation in which projects earnings are above the

average and which ones fall below.

GRAPHIC PRESENTATION

•f 140 •f 110

•f I to

♦ MO

••> I 00

-♦-9 0

+ 00

•♦• 70

•♦• 60

-♦■ SO

•(- 40

•(- 10

•I- 20

+ I 0 J.R.H. CORP.