in this form.

Federal Power Commission, National Power Survey, "Cost of Distribution of Electrkily," l'J35 SCALE .5

B. Essential Parts of a Complete Electric Power System.

1. In this diagram of the essential parts of a complete electric power system, a hypothetical

land lay-out is used, since the important point is to include the information in the smallest possible space.

2. An attempt was made in this drawing to give the effect of a "bird's-eye view"

GRAPHIC PRESENTATION

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RELIEF AND AERIAL MAPS

N.-ition;.! Rc^ourrri Board. -State Hlaiiiimi; 1 '7 t -. SCALE .7

Bird's-Eye View of the Passamoquoddy Tidal Power Project in the State of Maine.

1. This is an example of a pictorial map suggesting contours and character of the region

represented.

2. For popular presentation, this combines the qualities of the pictorial and relief types

of map.

GRAPHIC PRESENTATION

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SCALE .5

A Map Drawn on Azimu+hal Projection with New York as the Central Point.

RELIEF AND AERIAL MAPS

WPA. Division of Social Research. "Landlord and Tenant on the Cotton Plantation." 1936. SCALE .7