A PRELIMINARY REPORT ON CLAYS OT FLORIDA 229


 A sample of the washed clay from the Edgar Plastic Kaolin Company's Plant at Edgar had the following physical properties:

 Physical Properties of Edgar Plastic Kaolin (Lab. No. 0-57).
 Plasticity, judged by feel........... Excellent.
 W ater of plasticity................. 34.65%
 Pore water ........................ 0.21%
 Shrinkage water .................. 34.44%
 Linear air shrinkage............... 10.0 %
 Volume air shrinkage.............. 27.5 %
 Modulus of rupture, average........ 169.1 pounds per square inch.
 Slaking test ....................... 5 minutes.
 Steel hard at cone 1.
 Fire tests:
Temperature. Linear Shr. Absorption. Porosity. Color.
 Per Cent. Per Cent. Per Cent.
 950*C. 5.0 29.49 45.75 White.
 1050 5.2 29.46 46.60 White.
 1150 6.0 20.32 37.80 White.
 1190 7.5 21.45 37.60 White.
 1230 12.0' 13.06 27.50 White.
 1310 12.0 14.30 30.20 White.
 1370 12.5 16.80 White.
 1430 13.0 7.07 White.


 A sample of the washed clay from the Lake County Clay Company's plant, near Okahumpka, had the following physical properties:

 Physical Properties of Lake County Clay Company Sedimentary Kaolin (Lab. No. o-84).
 Plasticity, judged by feel........... Excellent.
 W ater of plasticity................. 31.85%
 Pore water ........................ 0.42%
 Shrinkage water .................. 31.43%
 Linear air shrinkage............... 8.0 %
 Volume air shrinkage.............. 22.0 %
 Modulus of rupture, average........ 136.3 pounds per square inch.
 Slaking test ....................... 3 minutes.
 Steel hard at cone 3.
 Fire tests:
Temperature. Linear Shr. Absorption. Porosity. Color.
 Per Cent. Per Cent. Per Cent.
 950*C. 3.5 34.61 49.50 White.
 1050 4.5 30.79 47.20 White.
 1150 5.4 23.62 41.20 White.
 1190 10.0 23.60 34.75 White.
 1230 10.0 16.09 33.50 White.
 1310 14.5 14.74 30.75 White.
 1370 17.0 6.38 16.42 White.
 1430 18.0 5.14 12.40 White.