SAND-LIME BRICK. IO3 



Atlantic Coast Line Railroad Company. 



Interlachen Gravel Company, Interlachen, Fla. 



Lake Wier Sand Company, Lake Wier, Fla. 



Logan Coal and Supply Company, 866 East Bay St., Jacksonville, Fla. 



W. E. Long, Orlando, Fla. 



Walter L Wescott, Orlando, Fla. 



Woodman and Company, Ocala, Fla. 



SAND-LIME BRICK. 



The materials used in the manufacture of sand-Hme brick are 

 sand and lime. The bonding power of the brick is due to the 

 chemical reaction between these ingredients. The chemical changes 



Fig. 24. — Ponce de Leon Springs, Holmes County. 



occur in the presence of heat, pressure and moisture, and result in 

 the formation of hydro-silicates of calcium and magnesium. 



The sand used in the manufacture of sand-lime brick should be 

 comparatively pure and perferably with some variation in the size 

 of the grains. The mixture of lime, sand, and water, is cut in the 

 form of bricks and conveyed to a hardening cylinder. Necessary 

 heat and pressure are obtained in the hardening cylinder adapted for 

 the purpose. The sand-lime bricks are placed in this cylinder and 

 subjected to a pressure and temperature which vary according to 

 the method of treatment. 



Four companies were actively engaged in the manufacture of 



