MINERAL INDUSTRIES OF FLORIDA DURING 1916. 
E. H. SELLARDS. 
The value of minerals produced in Florida during 1916 shows 
an increase over that of the preceding year. The total mineral 
production during 1915 is valued at $5,035,010, while that for 1916 
is valued at $5,859,821. 
BALL CLAY OR PLASTIC KAOLIN. 
Three plants were engaged in mining ball clay in Florida during 
1916. These were the Edgar Plastic Kaolin Company, Edgar; the 
Lake County Clay Company, Okahumpkee; and the Richmond 
China Clay Corporation, Okahumpkee. The ball clays of Florida 
are white burning, refractory clays notable for their plasticity. 
They occur in association with sand from which they are separated 
by washing. The value of the ball clay produced, although not 
separately given, is included in the total mineral products of the 
State. 
BRICK AND TILE. 
The total number of common brick manufactured in Florida 
during 1916 was 31,029,000. In addition to building brick there 
was produced also drain-tile and fire-proofing brick. The total 
value of brick and tile products for the year 1916 was $226,362. 
The following firms in Florida reported the production of brick 
during 1916: 
Barrineau Brothers, Quintette. 
Campville Brick Company, Campville. 
Clay County Steam Brick Company, Green Cove Springs. 
Florida Industrial School for Boys, Marianna. 
Gamble and Stockton Company, 108 West Bay St., Jacksonville. 
Glendale Brick Works, Glendale. 
G. C. & G. H. Guilford, Blountstown. 
Hall and McCormac, Chiplev. 
Keystone Brick Company, Whitney. 
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