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m mt m m nonnnBHniKTononifaonaifatifuitstnimt

U. S. Department of Labor, Bureau of Labor StatUtici, "Labor Information Bulletin," April 1936.

A. Physical Volume of Industrial Production in the United States fronn 1919 to 1936. 1923-25 Average Equals 100%.

Compare with B below.

INDUSTRIAL PRODUCTION

(PER CAPITA)

Magazine of Wall Street, January 29, 1938. B. Per Capita Industrial Production in the United States fronn 1875 to 1938. 1923-25 Average Equals 100%.

This silhouette is different from most m that the grid above the plotted line is eliminated. Compare this chart with A above and 2 73.

INDEX NUMBERS SHOWN BY CURVES

Yearly Output of Four Important Industries in the United States from 1919 to the Middle of 1936. Relative to 1923-25 Average.

Notitheuse of iirruws lo imlu-ntr tinscale applii'iiblr tu tlic ilata.

The reas«)ii (or prisj-ntmj; this material in 'his form was no doubt to avoid crossing the curves. Compare tJus nuthoil with .U)JA.

Fr.lci

Kurtvr Blink of New w ■■ Aiimi»t 1. l'JJ6.

York, ••Monthly

INDCXtS or INDUSTRIAL PRODUCTION

MCTAL INDU5TRIC3

1921 l^^^ nzi I9^■^ i925 l^^6 isz' on i929 i9J0

Brown Bineham. ami TrmnomrroH. ' Laboratory Handbook of Statistical Methods/' McGraw-Hill, 1931.

B. An Example of a Multiple Axis Graph.

1. It has been noted that when a multiple scale is used on an arithmetic chart, all scales must have a common zero line. When the data are chant; ed to index numbers, it is possible to arrange the curves on a multiple axis; that is, each curve fluctuates around its own base, or 100, and can be moved farther from or closer to other curves without distorting the facts presented.