COLUMN DESIGNATIONS It is generally more difTKult to lobcl segmented or grouped columns than curves because tfie columns themselves take up so much more of the spoce Segment labels should be placed ocross several columns il procticobte However, the space about labels should be reduced as much as possible and too much controst with the tone of the column ovoided so os not to distort the impression of the relative lengths of the columns ond segments Where labels cannot be placed on the columns, orrows may be used A key or legend should be used only when improcticoble to lobel directly.

COIUMN CHART DESIGNATIONS Column chart titles con often be ploced most effectively occordmg to the distribution of the columns rather than in a fixed position ol the top Ithe usual cose with line chortsl.

Not* An •mpir<ol rtloliOns^'P b*»w--n column ond ipoc* it IXtMAtsd in

ih« Chon b*iow. boMd on on octuoJ )Mt o( cHom qI root-two propofttont

ond vOf'Ovi numb«f| o* columns, onm Ml wndOf -thon-hioh ond onoHlV high«r -thanwtd«.

To space columns equoHv dong the titne scale, divide the ovoikibte horizontal spoce mio twice as mony spaces os there ore to be columns. Then center the columns on every other division mark begmnirtg with the First from either end.

GRAPHIC PRESENTATION

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Magazine of Wall Street, January 29, 1938.

SCALE .5

A. National Income of the United States in Billions of Dollars from 1929 Through 1937.