CALCULATION AND CONTROL OF THE MIX 



397 



TABLE 173. 

 CHANGE IN COMPOSITION DURING BURNING. 



This point is also illustrated by the following analyses of raw mix 

 and cement from the Syracuse plant, analyzed by Hillebrand.* 



TABLE 174. 

 CEMENT MIXTURE AND CEMENT, SANDUSKY. 



It will be seen that in both these experiments the Cementation Index 

 of the cement has been raised considerably by the amount of silica and 

 alumina taken up during calcination. 



* Jour. Amer. Chem. Soc., vol. 25, p. 1186. 1903. 



