THE ARTESIAN WATER SUPPLY OF EASTERN FLORIDA. 163 
range from 143 to 200 feet. All of the wells of which record has 
been obtained are four inches in diameter. The length of casing 
used in the wells averages 60 feet. 
Four wells drilled for J. H. Bahrenberg & Brother by N. H. 
Monck in December, 1909, gave the following pressures. Well No. 
1 is 143 feet deep and is cased 65 feet. The pressure of this well 
as shown by the pressure gauge December 4, 1909, was 5 H pounds. 
Well No. 2 is 160 feet deep and is cased 74 feet. The pres¬ 
sure December 4, 1909, was 5pounds. Well No. 3 is 219 feet 
deep and is cased 54 feet. The pressure of this well on the same 
day was five and one-quarter 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 diminished with depth. In this respect the wells are excep¬ 
tional. The amount of flow of these three wells was not obtained. 
The following is the record of well No. 4 made from the sam¬ 
ples kindly kept by the driller. 
Feet 
Sand . o- 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 1 x / 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 con¬ 
tains 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 Geo 
