A Comparison of the Air Line Routes in 1928 and in 1938 of What Is Now the Eastern Air Lines in the United States.

1. A "then" and "now" comparison is easily made on two maps.

2. Note that a great deal of black ink was used and that as a result the routes and the

names of the cities are easily seen.

SCALE .8

B. Connparison of the Areas of the United States and Europe. Compare the effectiveness of this with 162 A.

GRAPHIC PRESENTATION

National Rrsourcrs Board. "Rrnort of the Watrr PlanniiiR Committrf, Part III," 1934.

Main Electric Transmission Lines in the United States in 1933.

1. In the original of this map. the whole of the United States was given.

2. In order not to reduce the map and thus lose much of its detail, a section only is

reproduced.

GUIDE AND ROUTE MAPS

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GRAPHIC PRESENTATION

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Nnlional Rt-sourcc» Board. "Statf PlanninR." 1035. SCALE .5

A. Existing Routes of Midwestern Airways and Routes Suggested by the Iowa State Planning Board.

1. Because its state planning board prepared this map, Iowa is emphasized.

2. The inclusion of states other than Iowa makes it clear why the new air routes are