Idl Horizontal Line Shading has limited usefulness and is not generolly recommended.

(el Crosshatch Shading (diagonal! is recommended in place of black for wide columns. Crosshatch shading mode by crossing verticol and horizontal lines is not recommended.

If) Dotted Shading (pebbled or stippled) is sometimes effective for columns of medium width and particularly for small segments for charts in which a third or fourth distinguishing shading is needed.

(g) Hollow columns, if distinctly wider or narrower than the space between and outlined with a heavy line.

Columns may present undesirable optical illusions unless slight correctives are applied. A white or lightly shaded segment on top of a column may appear to spread unless the column outline is tapered about the width of a line; a block segment may appear more narrow than the rest of the column unless it is widened about the width of o line; a tall column may appear to be thinner in the middle unless the lines ore bowed out slightly.

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OIACONAL SMAOINC

MAT 'KNO' iXADINO MAT AfFCCT

TMC COLUMNS APPAACHT WIDTH

Effscts of improper use of shoding

£20

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SOCIAL OTHII SICUdTT

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AdNCIIS (ILATIVIS

Dun't Review, June, 1938.

A. Means of Support of Persons 65 Years of Age or Older Living in the United States in April. 1937.

CONTRASTING BAR CHARTS

Dun's Review, April, 1938.

A. Adver+ising Expenditures for Newspapers, Magazines, and Radio in the United States from 1929 to 1937.