TOTAL 949,338

993,597

951,015

WPA. National Research Project, "Summary of Findings to Date." March, 1938.

Percentage Distribution of Wage Earners Employed in the Mineral Industries In the United States in 1909. 1919, 1929, and 1935. MILLION

ANNUAL

TOTAL

INCOMES

PCRSONS

IN BILUON DOLLARS TOTAL INCOME

>IOOO AND UNDER

•I000TO2000

'2000TO5000

.5000 TO )5000

•ABOVE I5000<

S. S. Wycr, "LivinR Together in a Power Age," Association Pres^, New York, 1936. 8CALK .9

Distribution of the Income of the People in the United States in 1929.

1. The method of reading this chart is as follows: the people in the United States whose

incomes are $1000 or under comprised 40% of the population and contributed 12% of the total national income in 1929; the people in the United States whose incomes are from $1000 to $2000 conrprised 40% of the population and contributed 31% of the total national income in 1929.

2. The use of arrows and distinctive gradations of shadings aid in reading this chart.

COMPARISON OF 100% BAR CHARTS

CHARACTERISTICS OF BAR CHARTS:

1. Bar charts may be adapted to fit almost any application.

2. The height of each bar is easily compared.

3. There should be some order for arrangement:

a. Time-series

b. Magnitudes

c. Geographical

d. Alphabetical

4. The actual amount which each bar represents should be given.

ITEMS

ORDERS

ORDERED ONCE IN A SIX MONTHS PERIOD

ORDERED MORE THAN TIMES

ORDERED 10-24 TIMES

ORDERED 25-50 TIMES

ORDERED more: TIMES