EXPERIMENT STATION BULLETINS. 



309 



to 5 grams of unleached minerals and rocks and determining the freezing 

 point depression of the mixture immediately and at various intervals for a 

 prolonged period. Two different temperatures were employed in this series 

 of experiments: room temperature and a temperature of 53°C. The results 

 obtained are shown in the tables 15 and 16. 



TABLE 15. — Rate and extent of solubility of unleached minerals and rocks when the ratio of solid to liquid 

 was 1 to 5 and inixtures viaintained at room temperature. Figures represent freezing point depression. 



