242 
FLORIDA STATE) GEOLOGICAL SURVEY. 
wells are used for power purposes, such as for generating elec¬ 
tricity by means of a water turbine. A ten-inch well, drilled in 
1893 and now owned by Mr. G. M. Houston, about one and one- 
half miles south of Rockledge, is used for this purpose. The well 
has a reported depth of 480 feet. A gauge on the well indicated 
a pressure of 12J4 pounds, March 10, 1910, or a head of 28.8 feet 
above this point. The gauge was estimated to be ten feet above 
the level of the water in the river, thus giving the well a total 
head of 38.8 feet above the river level. The water contains a trace 
of salt, as is common to the wells in this vicinity. 
The well of Mr. H. S. Williams is of particular interest, in that 
it is the only well in this vicinity, of which a log has been obtained. 
It was drilled about 1890 and is 304 feet deep. It is three inches 
in diameter and is cased 130 feet. The following is a log of this 
well, as reported by Mr. Williams: 
Feet. 
Sand and soil . 0 - 10 
Coquina rock . 10 - 30 
Sand . 30 -100 
Sand rock . 100 -140 
Blue clay . 140 -170 
Hard flint rock. At this depth water rose to the surface, 
small stream . 170 -173 
Rock in layer from 3 to 18 inches thick. 173 -269 
Hard rock . 269 -273 
Soft rock . 273 -278% 
Hard rock, good flow of water. 278%-304% 
The first flow in the well, as will be seen by consulting the log, 
was obtained from a depth of 170-173 feet. At this depth 3 feet 
of hard flint rock was encountered and on penetrating this stratum 
the first water-bearing formation was reached. 
SHARPES. 
Several flowing wells occur in and near Sharpes. The water 
here contains salt to such an extent that it can not be used for 
irrigation. The well of J. W. Spafford furnished the following 
record. The well is four inches in diameter and 200 feet deep. 
It is reported cased only about 40 feet, and to have a head of 10 
