the highly skilled reader who can refrain from regarding the five different items listed as of somewhere nearly equal numerical importance, simply because the five different items are given exactly the same space and prominence when written down on the page.
| Percentage of Each Race in the Population of the World | |||
| Yellow | 45 | ||
| White | 41 | ||
| Black | 11 | ||
| Brown | 2 | ||
| Red | 1 | ||
It requires mental concentration in interpreting even these simple figures to get the correct impression of the very large percentage of the two chief races and the numerical insignificance of the one last named. If these data were shown in a simple horizontal bar, somewhat like that seen in Fig. 1, the relative proportions of the different races
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Fig. 1. Disposition of a 5-cent Fare Paid to the Boston Elevated Railroad in the Year
Ending September 30, 1909
The horizontal bar gives an especially good method for showing component parts
