EXPERIMENT STATION BULLETINS. 



301 



TABLE 7. — Rate and extent of solubility of leached powdered minerals when the ratio of minerals to distilled 

 water was about 1 to 0.75 and mixture maintained at room temperature. Figures represent freezing 

 point depression. 



Days. 



Apatite 



Amphibole 



Apophyllite 



Calcite 



Chrysolite 



Epidote 



Gypsum 



Hematite (micaceous) 



Kaolinlte 



Llmonlte 



Oligoclase 



Orthoclase 



Prochlorite 



Pyroxene 



Quartz 



Serpentine 



Siderite 



StiUbite 



Talc 



Zircon 



50. 



C°. 

 .013 



.010 



.035 



.009 



.009 



.010 



.045 



.007 



.008 



.009 



.011 



.010 



.010 



.010 



.009 



.011 



.028 



.009 



.014 



.008 



TABLE S.^Rate and extent of solubility of leached powdered rocks when the ratio of rock to distilled water 

 was about 1 to 0.75 and mixture maintained at room temperature. Figures represent freezing point 

 depression. 



