WATER SURREY OE EASTERN AND SOUTHERN EEORIDA. 209 
pressure December 4, 1909, was 5/4 pounds. Well No. 3 is 219 
feet deep and is cased 54 feet. The pressure of this well on the 
same day was 5J4 pounds. Well No. 4 is 160 feet deep and is 
cased 58 feet. This well was not finished at the time the pressure 
of wells Nos. 1, 2 and 3 was taken. As will be seen from the 
above records the pressure in the case of these three wells di¬ 
minished with depth. In this respect the wells are exceptional. 
The amount of flow of these three wells was not obtained. The 
following is the record of well No. 4, made from the samples 
kindly kept by the driller: 
Feet. 
Sand . 0 - 5 
Olive green calcareous clay, with black phosphatic pebbles 
and fragments of shell, and flattened water-worn 
gravels. 5- 40 
No sample . 40- 45 
Similar or somewhat more calcareous green clay or clayey 
marl. This sample' contains occasional fragments 
of chert . 45- 80 
This sample contains the black phosphatic water-worn 
pebbles in greater number than the above sample. 
Clear quartz grains are numerous. Flattened, water- 
worn siliceous pebbles up to size 1x^2 inches occur... 80- 90 
In this sample clear quartz grains predominate. These are 
mixed with gray sand grains. Calcareous gray sand 
nodules occur, water-worn chert gravels are present, 
also numerous large, water-worn chert fragments.... 90-113 
No sample..... 113-115 
Loose, clear-grained sand in mass appearing light gray and 
contains a small amount of calcareous matter in the 
form of fragments of shell .. 115-160 
PALATKA. 
Palatka, the county seat of Putnam County, is located on the 
St. Johns River, 55 miles south of Jacksonville. The elevation 
of the Atlantic Coast Line depot, as recorded by the U. S. Coast 
and Geodetic Survey, is thirteen feet above sea. Records from 
35 wells have been obtained from and in the vicinity of Palatka. 
The first flowing water encountered at Palatka is obtained 
from a shell stratum at a depth varying from 30 to 60 feet. A 
