EXPERIMENT STATION BULLETINS. 



305 



TABLE 11. — Rate and extent of solubility of leached powdered minerals when the ratio of minerals to dis- 

 tilled water was about 1 to 0.75 and the mixture m.aintained at a tem,peiature of SS°C. Figures represent 

 freezing point depressio7i. 



TABLE 12. — Rate and extent of solubility of leached powdered rocks when the ratio of rocks to water ivas 

 about 1 to 0.75 and mixture maintained at the temperature of 53°C. Figures represent freezing point 

 depression. 



39 



