The bars in blue arc the "special reference" industries. The magazine in which this chart appeared was interested chiefly in those bars colored blue, and used the simple method of color for emphasis.

CONTRASTING BAR CHARTS

COST OF LIVING

INOCX NUMBCRS. l«2« • 100

UMiTtO IMNGOOW

rilANCE (PAKiS

JA^AN (TOi>»0

MHO 5TATIS

SWlTZtBLAMO

WHOLESALE PRICES

INOO NUMBOS. i«;< = 100

"■'• . ^"X

UNiriD STATtS

UNITED niNCOOM

CZtCMOSLOVAr

NCTMtRLAND-

National Induitrial Conftrence Board, Inc., October 23, 1936.

Cost of Living and Wholesale Prices in the United States and Specified Foreign Countries for 1929 and 1936.

Compare this method of presenting two groups of facts with 144 A.

GRAPHIC PRESENTATION

0«n«ri ^^^^ Ttnonli

Hundrtd doHors

United States

New England Middle Atlantic East North Central West Nortti Central Soutti Atlantic Eost Soutti Central West Soutti Central Mountain Pacific

Seven Cotton States Alobamo Arkonsos Georgia Louisiana Mississippi Nortti Carolina Soutti Carolina

WPA. Diviiion of Social Research, "Landlord and Tenant on the Cotton Plantation," 1936. SCALE ,9

Median Value of Farm Dwellings by Tenure in the United Sta+es in 1930.

Divisions and subdivisions are possible in the bar chart as demonstrated in this one. The median value for the United States as a whole is first given, then for each of nine geographical divisions, and finally a separation of the "Seven Cotton States" is made.

Chapter 14 PICTORIAL UNIT BAR CHARTS

IN A pictorial unit bar chart comparisons are made by using a number of symbols, each of which represents a specific value. Synonyms for pictorial unit bar charts are pictogram, pictograph. The advantage of the pictorial unit chart over a chart in which large and small units are used is that there is a variation in one dimension only.