EXPERIMENT STATION BULLETINS. 



299 



TABLE 4. — Rate and extent of solubility of leached powdered rocks when the ratio of rocks to distilled icater 

 was 1 to 0.75 and mixture maintained at room temperature. Figures represent freezina point depression. 



TABLE 5. — Rate and extent of sohibility of unleached powdered minerals when the ratio of minerals to 

 distilled water was 1 to 0.75 and the mixture maintained at room temperature. Figures represent 

 freezing point depression. 



