A PRELIMINARY REPORT ON CLAYS OE ELORIDA 
201 
A similar clay occurring on the property of J. J. Goss, near River- 
dale, has the following physical properties: 
Physical Properties of J. J. Goss Clay, River dale (Lab. No. o-JJ). 
Plasticity, judged by feel... 
Water of plasticity. 
Pore water. 
Shrinkage water . 
Linear air shrinkage. 
Volume fire shrinkage. 
Modulus of rupture, average 
Slaking test. 
Excellent. 
21.15% 
0.40% 
20.75% 
6.5 % 
16.1 % 
211.9 pounds per square inch. 
10 minutes. 
Fire tests: 
perature. 
Linear Shr. 
Per Cent. 
Absorption. 
Per Cent. 
Porosity. 
Per Cent. 
Color. 
950°C. 
1.0 
28.98 
38.90 
Brick red. 
1050 
1.5 
27.72 
35.50 
Brick red. 
1150 
2.5 
20.48 
29.20 
Brick red. 
1190 
2.5 
19.30 
27.60 
Brick red. 
1230 
2.5 
19.04 
25.60 
Brick red. 
ST. LUCIE COUNTY 
St. Lucie County is located just northeast of Lake Okeechobee and 
borders the Atlantic Ocean. It is underlain by marls and sands of 
Pleistocene age. No clays of importance are known. 
SANTA ROSA COUNTY 
Santa Rosa County is situated in west Florida just east of the Es¬ 
cambia River and extends from the Alabama boundary to the Gulf of 
Mexico. The surface formations are sands, marls and clays, ranging 
from Pleistocene to Recent in age. The Citronelle formation underlies 
portions of the western part of the county. 
The clays of Santa Rosa County have, in the past, been practically 
unworked. This lack of development is largely due to the absence of 
transportation facilities in those sections of the county where the clays 
of greatest promise occur. The Louisville and Nashville Railroad 
traverses the southern part of the county from east to west, and the 
Florida and Alabama Railroad extends from Milton northeastward into 
Alabama, but the clays most suitable for commercial uses lie in the 
northwestern part of the county. 
The Board of Trustees of the Allentown Consolidated School Dis¬ 
trict, nine miles north of Milton, have followed a novel procedure to 
