Country Gentleman

Fig. 172. Dates for Planting Com, Showing How the Season Advances in Different Parts of the United States

This illustration is similar to the well-knowB weather maps on which lines are drawn through all points where conditions are the same

Railroad Operating Costs, Suffern & Son, New York

Fig. 173. Profile of the Pennsylvania Railroad from Jersey City to Chicago. The Tabulated Figures Below the Profile Refer to the Spaces Between the Dotted Lines

This is an example of a valuable method of presentation by which a horizontal scale much smaller than the vertical scale is used so that great distances may be represented in a small space

GRAPHIC METHODS

an area basis. For the purpose of a visual and mental test, the area basis may be used if Idaho and Texas are compared.

The method of Fig. 176 is now quite commonly used in Government publications. This scheme for presenting data is not so striking to the eye as that of Fig. 175, but it is more accurate. The scale given with the map permits the number of cattle for any State to be read fairly accurately. The degree of accuracy depends upon the map size selected, and upon the number of dots used to represent any given quantity. The more dots used the greater the accuracy. There is.

GTaham Romeyn Taylor on "'Satellite Cities" in the Survey

Fig. 174. Map Showing that Factory Workers of Norwood and OaJdey (Cincinnati) Live Long Distances from Their Work, Many in the Heart of Cincinnati Rather than in the Suburbs Near the Factories