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FLORIDA STATE GEOLOGICAL SURVEY. 
or about 18 feet above sea, thus making a total head of 66.51 feet 
above sea. 
Another three-inch well was drilled by H. C. Russell for 
T. R. Wells & Brother. This well reached a total depth of 420 
feet and is cased 192 feet. The pressure of this well, as shown 
by the pressure gauge, February 3, 1910, was 19 pounds or a 
head of 43.89 feet above the surface. The elevation of the well is 
approximately 3 feet higher than the depot or 5 feet higher than 
the Wilson well. The head would thus be 66.89 feet above sea 
or about the same as that of the Wilson well. 
In February, 1910, H. C. Russell completed a second well for 
J. R. Wilson. This well is located about three-fourths of a mile 
east of Callahan. It is a three-inch well and reaches a total 
depth of 489.7 feet. 212 feet of 3-inch casing was used. The 
first flow in this well was encountered at 200 feet, the second at 
275 feet and the third at 425 feet. Although the drilling in this 
well was continued to a depth of 489.7 feet it is reported that no 
increase of water was obtained below 460 feet. The following 
is a log of this well as constructed from the notes kept by the 
driller and from samples of the drillings saved by him: 
Feet. 
Sand . 0- 2 
Red clay . 2- 10 
Blue clay and sand. 10- 45 
Shell deposit, including a thin layer of hard rock at 52 ft. 
Water above and below this rock comes to within ten 
feet of surface . 45- 60 
Blue marl with occasional beds of shells 3 or 4 feet thick 
and containing black to dark gray water-worn pebbles. 60-200 
Medium coarse sand with numerous very small black grains 
or pebbles. A flow was obtained at this depth.200-212 
Limestone (sample) .212-255 
Blue marl and fine sands with inclusions of several thin 
strata of shell. (Sample).255-355 
Very hard rock. 355-364 
Indurated gray sand and blue marl.364-418 
Rock, hard and soft strata with increase of flow upon pene¬ 
trating each hard stratum. No increase reported below 
460 feet. Driller reports the rock to be closer grained 
from 460 to 489.7 feet, and not containing much water..418-489.7 
