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Chapter 26 '''* ^"'"^ '*'°'''''' "■''

I93Q.

MAPS WITH SYMBOLS

QUANTITATIVE material may be presented in the form of symbols by increasing the number of symbols as in "Pictorial Unit Bar Charts" on pages 121-131. A variation in the type of symbol may also indicate a quantitative difference.

WPA, Divbioa of Social Rrtcarch. "The Micratory-Catual Worker," 1Q37.

SCALE .8

State of Principal Employment for 100 Migratory-Casual Workers in 1933 and 1934 in the United States.

1. From this map, it can be seen that certain states ofTer relatively more casual employment to the migratory worker than others.

2. Note the relationship between this map and 230.

GRAPHIC PRESENTATION

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WPA. E>ivision of Social Research. "Urban Workers on Relief," 1936. SCALE .7

A. Principal Occupations in Selected Cities of the United States in 1936.

No quantitative data is presented in this map. It is merely a device to show the principal occupations in certain cities of the United States.