154 FLORIDA GEOLOGICAL SURVEY-15TH ANNUAL REPORT

 Fire tests:
Temperature. Linear Shr. Absorption. Porosity. Color.
 Per Cent. Per Cent. Per Cent.
 950'C. 0.8 19.23 35.40 Pink.
 1050 1.7 19.90 33.10 Cream.
 1150 1.7 19.45 29.75 Cream.
 1190 2.7 11.30 24.20 Cream.
 1230 2.2 10.10 24.60 Gray.
 1310 4.2 7.72 21.50 Gray.
 1370 4.7 5.39 16.90 Gray.
 1430 6.7 1.72 4.85 Gray.

 A dense, gray, plastic clay is of rather widespread occurrence in the region about Quintette. An extension or outlier of what is probably this same deposit is exposed at the upper end of Lower Dexland Bluff. It underlies both the hill just west of Quintette station and the one about one quarter-mile northward. It was also observed on the property of S. J. Baumeister, one-half mile west of Quintette. A section made at the Barrineau Bros. Brick Company's plant at Quintette is as follows:

 Section of Barrineau Bros. Brick Company Clay Pit, Quintette.
 Soil .............................. 3 feet.
 Sand ............................. 3 feet.
 Limonite ......................... 6 inches.
 Clay ............................. 2 feet.
 Limonite .......................... 2 inches.
 Clay, gray, dense, plastic........... 30 feet plus (variable).
 Limonite ......................... 3 inches (in places only).
 Sand .......................... ? (in places only).

 In many places the limonite overlies a cross-bedded sand.
 The Barrineau Bros. Brick Company use this clay for the manufacture of face and common brick and turpentine cups. Their plant is located oti the Pensacola Division of the Louisville and Nashville Railroad. The product is marketed chiefly in western Florida, southern Alabama, Mississippi and Louisiana. Mobile and Pensacola absorb the greater part of the output. The First Baptist Church in Pensacola was built of this brick.
 This clay may be used for terra-cotta, stoneware, roofing tile, flower pots, as well as the common structural materials.
 This is not a red-burning clay as would be anticipated from its association with limonite, but a very light-pink at cones 010 and 05 and grades into buff, gray and grayish-brown as the temperature is increased. The physical properties are as follows: