"[98 I WATERS OF THE CARBONIFEROUS FORMATION. 50 



sandstone at McDouglas' mill (187, No. 1 of Sec. 2) and Jourdan's ; 

 would of necessity possess mineral properties. The small amount 

 of sulphates and of magnesia, which the mineral waters at Iuka 

 contain, seem to indicate that they are derived neither from this 

 stratum, nor from those of the lower cretaceous ; while the Orange 

 Sand alone would not be likely to impart sulphuretted hydrogen 

 to them. 



