Graphic Methods for Presenting Facts
washing machine into the area of the
larger washing machine. Methods like
this cannot be too severely condemned. Commercial geography, as it is now
widely taught in the public schools by
listing the various imports and exports of
countries and the products of different
cities, fails to give a clear idea of the
Guod Houstkccping
Fig. 18. Illustration Intended to Show that the Sale of Washing Machines has Increased Sevenfold in the Past Three Years
In comparing the two pictures it is not likely that the reader will obtain a ratio of seven to one. There is no way for the reader to tell on what basis the drawing was prepared, whether by height, area or volume. The title of this chart is also poor in that it does not name the two years for which the comparison is made
GRAPHIC METHODS
11,483.000 Bales of iOO lb
India
S,082,000
Egypt Russia
1,506.000
800,000
China, 775,000
Brazil 810,000
Tarr and McMurray' s New Geographies
Fig. 19. The Six Leading Cotton-producing Countries in 1910
This arrangement is a bad one to place before school children. The eye cannot fit one square into another on an area basis so as to get the correct ratio
relative importance of the materials listed. It frequently happens that the second or third item on a list may have only one-tenth the importance of the first item. Because the three names are given one after the other, the pupil is quite likely to consider the three items of equal United Stale, importauce, just as three