192 FLORIDA GEOLOGICAL SURVEY-THIRD ANNUAL REPORT.
them was an attempt made, so far as the records indicate, to go through or to case off the salt water stratum. Fresh water is obtained from shallow driven wells, none of which exceed ioo feet in depth. The water obtained from these wells as a rule does not flow. In at least one instance, however, a small flowing fresh-water well has been obtained at a depth of less than ioo feet. The wells which exceed ioo feet in depth as stated above have yielded only salt water.
The following is an analysis of the water of the well of the Titusville Ice Company. Analysis made for the State Survey in the office of the State Chemist, A. M. Henry, analyst:
Constituents. Parts per million.
Silica (SiO2) ............................................ 8.
Chlorine (Cl) ............................................11,879.
Sulphates (SO4) ......................................... 547.
Phosphates (P04) ...................................... o.
Bicarbonates (HC03) .................................... 177.
Sodium and Potassium (Na & K)......................6,542.
M agnesium (M g) ......................................... 669
Calcium (Ca)........................................637.
Iron and Alumina (Fe & Al)..............................3.
Loss on ignition .......................................... 1,380.
Total dissolved solids .......... ........................... 23,o6o.
VALKARIA.
A record of one deep well at Valkaria has been obtained. This well was drilled by Mr. W. J. Nesbitt in 1892 for Mr. E. A. Svedelius. It is a 3 inch well, 350 feet deep and is cased to a depth of 90 feet. The water is reported to rise 15 feet or more above the surf ace. At a depth of 320 feet hard rock was encountered and immediately below this rock the first water under sufficient pressure to cause it to rise to the surface was obtained.
ST. LUCIE COUNTY
LOCATION AND SURFACE FEATURES.
St. Lucie County lies south of Brevard County. It is 42 miles long and from 24 to 42 miles in width. Ft. Drum ridge in this
county has an elevation of 66.74 feet above mean sea level.* The eastern part of the county aside from the line of sand dunes near the coast consists largely of palmetto flatwoods. Towards the west border the land is more rolling and numerous small lakes occur. Some muck lands are found near the headwaters of the St. Johns River.
*Survey made in 1903, under the direction of Captain F. R. Shunk, U. S. Army.