148 
FLORIDA GEOLOGICAL SURVEY-I5TH ANNUAL REPORT 
Fig. 18.—View of drying shed showing method of stacking brick for drying. 
Dolores Brick Company, Molino, Escambia County. 
Physical Properties of Gull Point Clay No. 3 (Lab. No. 0-31). 
Plasticity, judged by feel. 
Water of plasticity . 
Pore water. 
Shrinkage water. 
Linear air shrinkage. 
Volume air shrinkage. 
Modulus of rupture, average. 
Slaking test. 
Steel hard at cone 1. 
Fire tests: 
Temperature. Linear Shr. Absorption. 
Per Cent. Per Cent. 
950°C. 1.8 21.20 
1050 2.0 20.10 
1150 4.3 11.40 
1190 5.3 6.56 
1230 7.8 4.32 
1310 11.3 3.29 
Excellent. 
32.25% 
2.61% 
29.64% 
9.7% 
32.8% 
251.5 pounds per square inch. 
1 hour. 
Porosity. 
Per Cent. 
Color. 
38.40 
Reddish pink. 
36.70 
Reddish pink. 
24.50 
Chocolate brown. 
14.90 
Chocolate brown. 
10.40 
Chocolate brown. 
7.40 
Chocolate brown. 
Dexland Clay No. 2 is a thin stratum, six or eight inches, exposed 
in Lower Dexland Bluff. It has an appreciable amount of quartz sand. 
Its physical properties are : 
