182 FLORIDA STATE GEOLOGICAL SURVEY. 
Hard and soft rock in thin layers .640-555 
Soft rock .555-57G 
Hard and soft rock in thin layers .576-GOO 
MAXVILLE. 
Maxville is located on the Seaboard Air Line Railway, near 
the southwestern corner of Duval County. The elevation at this 
point is, according to the profiles of the railroad, about 93 feet 
above sea. A well drilled at this place in 1902 for Mr. R. V. 
Douglass is reported to have reached the depth of 650 feet. This 
well is non-flowing. 
MAYPORT. 
The following is an analysis of the water of the well of the 
Florida East Coast Railway at Mayport. The well is 600 feet 
deep and has a pressure of 22 pounds. Analysis by the American 
Water Softener Company, Philadelphia, Pa.: 
Grains per Parts per 
Constituents. 
U. S. gallon. 
million. 
Calcium carbonate . 
. 3.57 
60.20 
Calcium sulphate . 
. 5.33 
91.37 
Magnesium carbonate . 
. 4.46 
76.45 
Sodium carbonate . 
.70 
] 2.00 
Sodium chloride .... 
. 2.45 
42.00 
Free carbon dioxide . 
. .32 
5.48 
Iron, aluminum and silica . 
. .33 
5.65 
Incrusting solids . 
. 13.69 
234.68 
Non-incrusting solids . 
. 3.13 
53.65 
Total solids . 
. 18.09 
310.11 
The following is a log of a well drilled at Mayport by B. S. 
Partridge for the Florida East Coast Railway. The record has 
been made available by Mr. G. A. Miller: 
Feet. 
Sand and muck . 0- 57 
Rock . 57- 61 
Sand . 61- 85 
Rock . 85- 87 
