THE ARTESIAN WATER SUPPLY OF EASTERN FLORIDA. 177
Feet.
Sand ..................................................0 2Clay ..................................................25-45
Shell ......................................................... 45 50
Rock.................................................. 0 55
Sand ........................ ................................ 55-105
C lay .........................................................105-113
Shell, water-bearing .......................................... 113-125
R ock ... ... ................................................. 125-149
Sand........... .......................................149-157
Rock .................................................157-197
Sand and shell ............................................... 197-237
R ock ........ ................................................. 237 247
Clay .................................................247-257
Sand .......... ................................................ 257-265
R ock ......................................................... 265-277
C lay ....... ................................................. 277 292
Shell and clay.-.........................................29372
R ock ................... ................................. 372-392
Cavity w ith w ater ............................................ 392406
The following is an analysis of the water from the six-inch
city well at DeLand. Analysis by H. Herzog, Jr., Gainesville, Fla.
Constituents. Parts per Million.
Total solids .............................................. 136.29
Residue after ignition (mineral matter)...................76.II
Gas and ignition (organic matter).......................6o.17
Sodium chloride ..................................... '1.31
Free am m onia ........................................... .68
Albuminoid ammonia ................................. .17
Oxygen (consuming power)........................ 4
Nitrates ............................................... .34
Nitrites ...............................................Non
Sulphates ...............................................2.05
Phosphates.......................................... Trace
IN1 IRPRIS1,".
Flowing wells are obtained at Ente-prse along the shore of Lake Monroe and in areas where the elevation does not exceed more than ten or twelve feet above the level of the water in the lake. The
depth of the wells in this vicinity ranges front 20 to 200 or more
feet, the average depth being between 90 and tI o feet. The water
is hard and is charged with hydrogen slphide, ir some instances containing a large amount of salt. A well on ed by Mr. William S. Thayer was drilled to a depth of 98 feet Ui is two inches in diameter and is cased 45 feet. The estited elvation of this well is 15 feet above the level of the water in Lke Monroe. The

"44 G14