EXPERIMENT STATION. 773 



One hundred parts of the ash contained (I.) : — 



Per cent. 



Potassium oxide, 4.8-i2 



Sodium oxide, 12.050 



Calcium oxide, 2.G91 



Magnesium oxide, 2.753 



Ferrie oxide, .338 



Sulphuric acid, 7.986 



Phosphoric acid, 6.240 



Mud. 



Soil from a Diked Marsh. 



]\Ioisture at 100° C, 



Ash, 



Calcium oxide. 



Potassium oxide. 



Phosphoric acid, 



Nitrogen, 



Insoluble matter, 



Per cent. 



33.40 

 7.85 

 1.24 

 .26 

 .13 

 1.64 

 3.65 



