Map shows early twentieth century submarine telegraph cables, railroads, and steamship routes in Central America. Insets: "Proposed Panama Canal" and "Proposed Nicaragua Canal." Relief shown by shading. Scale [ca. 1:5,000,000].
Map shows early twentieth century Mexican International Railroad lines, geography, and cities in Mexico and the southwest United States. Includes legend, distance table, and two profiles of routes between Ciudad Porfirio Diaz and the Pacific Ocean; illustration of the International Bridge on title panel. Inset: Valle de Mexico. Relief shown by shading. Scale [ca. 1:4,600,000].
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