THE ARTESIAN WATER SUPPLY OF EASTERN FLORIDA.

Scale of Miles
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Fig. ii.-Map of flowing area of Nassau and Duval Counties. The area in which flowing wells can be obtained is indicated by shading.
DUVAL COUNTY.
LOCATION AND SURFACE FEATURES.
Duval County joins Nassau County on the south, and is separated from it by the Nassau River and its tributary, Thomas Creek. The St. Johns River flows through Duval County. The
surface drainage from this county is carried off largely through these rivers and their tributaries.
The surface is in general flat or but slightly rolling. The surface elevationrises gradually from sea level. The highest elevation reached is found in the southwestern part of the county

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