The sides of the columns are really straight and parallel

the one who drew it. In every editorial office the

fact is recognized that one proof-reader will find important errors that were overlooked by another reader equally expert. Further, a mind much occupied with an idea may often fail to see important gaps in its statement, verbal or graphic, until perhaps they are noted by someone less familiar with the subject. Two points of view are always better than one.

Courtesy of the Orolier Society and of Popular Mechanics

Fig. 256. An Optical Illusion

The policeman appears much taller than the girl. In reality the figure of the girl is ^\ inch taller than the figure of the policeman

360 GRAPHIC METHODS

CHECKING LIST FOR GRAPHIC PRESENTATIONS

1. Are the data of the chart correct?

2. Has the best method been used for showing the data?

3. Are the proportions of the chart the best possible to show the data? ,,

4. When the chart is reduced in size will the proportions be those best suited to the space in which it must be printed?

5. Are the proportions such that there will be sufficient space for the title of the chart when the chart has been reduced to final printing size? ,, .

6. Are all scales in place?

7. Have the scales been selected and placed in the best possible manner?

8. Are the points accurately plotted? ;

9. Are the numerical figures for the data shown as a portion of the chart?