THE ARTESIAN WATER SUP PLY OF EASTERN FLORIDA.

Southern and Florida Railway, an elevation is reached of 150 feet. On the Rochelle branch of the Atlantic Coast Line Railroad an elevation of 105 feet occurs at Interlachen, in the central part of the county. That part of the county bordering the St. Johns River includes palmetto flatwoods and some open flatwoods. Much of the southern and western part of the county is occupied by the lake region, many small beautiful lakes occurring in this section.
WATER-BEARING FORMATIONS.
The data regarding the -formations reached by the wells in Putnam County is very meager owing to the fact that few well samples have been preserved.
After passing through the superficial sands in this county, calcareous clay and sands are reached, in which are imbedded black phosphatic pebbles and water-worn gravels. From such imperfect information as has been obtained it seems probable that some o F the wells terminate in this formation and do not reach the Vicksburg Limestone. The log of a well at Orange Mills, which terminated in loose clear-grained sand at a depth of 16o feet, is given on a subsequent page. A second well within a half-mile of this well apparently reached the Vicksburg Limestone at or about the depth of 160 feet. Samples from the well of B. F. Dotney, at San Mateo, drilled in I909 by H. Mervin, show the presence of black phosphatic pebbles as deep at least as 175 or 18o feet. At a depth of 315 feet' light-colored calcareous sands were penetrated. It is probable, as these wells seem to indicate, that the Vicksburg Limestone here as at some other localities has a very irregular top surface.
AREA OF ARTESIAN FLOW IN PUTNAM COU:TY
The flowing area of Putnam County includes a relatively narrow strip bordering the St. Johns River and its tributaries. Upon leaving the river the elevation rises and flowing wells are not obtained. The flowing area in this county is indicated by shading on the map. (Fig. I3, P. 155).
LOCAL DETAILS
BOSTWICK.
Flowing wells are obtained at Bostwick. A three-inch well drilled in 1904 for J. WV. Glisson by H. Mervin reached a total depth of 248 feet. This well is reported cased 6o feet and the water is reported to rise 18 feet above the surface.

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