THE ARTESIAN WATER SUPPLY OF EASTERN FLORIDA.

YELVINGTON.
Records of two wells have been obtained from and near Yelvington. Well No. i is located near Yelvington depot and is owned by E. L. Campbell. This well was drilled by Frank Bartlett in i99 and reached a total depth of 352 feet. It is reported as having 95 feet of four-inch casing. The head of this well was measured December ii, 1909. The water was found to stand at this time 71/ feet below the surface.
Well No. 2 is located one mile west of Yelvington depot. It is a four-inch well and is owned by Campbell and Killingsworth. This well wais drilled in 19o7 by S. I. Killingsworth and is reported to be 300 feet deep, and cased 18o feet. The water is said to stand two feet below the surface.
CLAY COUNTY.
LOCATION AND SURFACE FEATURES.
Clay County has a varied topography. The eastern portion bordering the St. Johns River is low and flat and consists largely oF open pine woods. Extending westward from the river the elevation rises and the country becomes more rolling. The county is intersected by a number of streams, the largest of which is Black Creek, a tributary to the St. Johns River. This stream is navigable for small boats to or above Middleburg, at which point it divides, forming the north and south forks. The north fork rises in Lake Kingsley, and with its tributaries drains the northwestern part of the county. The south fork rises in Blue Pond and other lakes and drains- the central part of the county. In the southwestern part of the county many small lakes occur.
The elevations in this county have been obtained from the levels made by the railroads crossing the county, including the Seaboard Air Line, the Atlantic Coast Line and the Georgia Southern and Florida Railway. In addition levels made during 19o9 by the U. S. Engineers in connection with a preliminary survey for a ship canal have been available. These levels show that the water level in Lake Kingsley stood at the time the levels were made 170 feet above sea. The measurements of depth show that this lake averages 58 to 6o feet, although one place was fold at which the depth exceeded 78 feet, the full length of the sounding line. The country surrounding this lake stands at or about 175 feet above sea. According to the levels made by the Seaboard Air Line Railway the town of Highland, in the northwestern part of the county, stands

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