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Chapter 24 MAPS WITH BAR CHARTS

ars superimposed on a map allow a great many comparisons not possible with one cross hatched map. Time-series bars may be placed on a map. A comparison of several items rather than the presentation of just one item may be obtained. The practices commended in the chapters on bar charts, pages 92-152, should be adhered to when bars are placed on a map.

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

Geographical Shift in Cof+on Manufacturing in the United States from 1923 to 1937.

1. Bar charts may be used as effectively as sector charts in presenting information for

geographical divisions.

2. Note the method of outlining in black the section of the United States to which specific

groups of bars refer.

3. See 93 A 4.

MAPS WITH BAR CHARTS

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