124 DETAILED REPORT ON ALABAMA CLAYS. 



Analysis of China Clay, Eureka Mines, DeKalb Co. (No. B 8.) 



Silica 47.00 



Alumina ." 38.75 



Water , 12.94 



Clay base 98.69 



Ferric oxide .85 



Lime. .70 



Magnesia ' tr 



Alkalies tr 



100.88 



Total fluxes 1.65 



Specific gravity 2.34 



This clay approaches closely to kaolinite in its 

 composition. 



(No. 128.) 

 CHINA CLAY, 



H. H. GRIFFIN, EUREKA MINE. 



This is a white clay, which represents the best qual- 

 ity obtained in the mines of H. H. Griffin, four miles 

 northeast of Valley Head. 



It is a very gritty, lean clay, which took 38.50 per 

 cent, of water to work it up. 



The air shrinkage was 3^ per cent., and at 2250 F. 

 it had only shrunk 6 per cent., and barely showed 

 signs of incipient fusion. Vitrification takes place 

 at 2800 F. The analysis of a clay from this locality, 

 from what is known as the Eureka Mine, and made by 

 A. T. Brainard, was kindly furnished to the writer by 

 Mr. Griffin. It is as follows : 



