Page:Graphic methods for presenting facts (1914).djvu/263

 pin has black figures on a white background, and does not give as striking an effect as white figures on a black ground.

Data, Chicago

Fig. 195. Location of the Portland Cement Plants of the Eastern Portion of the United States in 1911. Below the Map Is a Tabulation Giving the Name, Address, Capacity and Shipping Railroad for Each Plant

A pin map like this can be quickly made up by using pins such as are pictured in number 20 of Fig. 199 or pins such as are used in Fig. 196. An outline map with the pins can be photographed directly to produce an illustration like the above

Fig. 196 gives a hint of what may be done to prepare advertising copy with almost no expense. The illustration was made direct from a map on which pins were used having black areas lettered in white. The only hand drawing necessary for this illustration was about one minute's work in darkening the high lights where there were reflections from the surface of the black pins. An illustration of this type to show the location of agencies, branches, etc., makes effective advertising because the black spots are so large in comparison with the size of the map that the whole territory of the United States appears to be well covered by agencies.

Lettered or numbered pins like those in Fig. 196 and in Fig. 199 are frequently desirable to show the daily whereabouts of salesmen, repair men, etc., in order that the nearest man may be telegraphed to in