MINERAL INDUSTRIES FULLERS EARTH. 



35 



The fullers earth used in clarifying mineral oils, which includes 

 by far the greater part of that produced in America, is sold at 

 the mine, ground, bolted and sacked for shipment at about $9.50 

 per ton. That used for refining vegetable oils brings a somewhat 

 higher price, although more expense is incurred in handling, since 

 the earth must be ground finer for vegetable than for mineral oil. 



Fig. 5. — Fullers earth plant at Quincy, Gadsden County. 



Fig. 6. — Fullers earth plant at Ellenton, Manatee County. 



