Page:Graphic methods for presenting facts (1914).djvu/245

 Courtesy of Dr. Ewerbeck, Internationale Baufach-Ausstellung, Leipzig, Germany, 1913

Fig. 185. Passengers Carried in Twenty-four Hours on the Street-car Lines of Frankfurt a M., Germany. Each Vertical Strip Represents 4,000 Passengers

The map is about eight feet square. Strips of wood are glued above each street having a car line. This is an excellent presentation of facts