140 



Experiment Station Report, 



Salt Mud. 



[Sent on by L. B. Goodwin, So. Duxbury, Mass.] 

 [I. Sample taken from a dock dug in a salt marsh. The sender states that large 

 quantities of kelp have been unloaded at this dock, and a good deal of eel-grass is 

 also deposited.] 



[II. Taken from the flats at low-water mark.] 



Moisture at 100° C, . 

 Ash constituents, . 

 Insoluble in acids, 

 Nitrogen in organic matter, 



Soluble constituents contained : — 



Black Mud, 



[III. From the flats near Weymouth, Mass. Sent on by Thomas A. 

 Watson, Esq.] 



Moisture at 100° C, . 

 Ash constituents. 

 Insoluble in acids, . 

 Nitrogen in organic matter, 



56.55 



39.60 



3184 



.30 



Soluble constituents contained : — 



Sesquioxide of iron, 

 Calcium oxide, . 

 Magnesium oxide. 

 Potassium oxide. 

 Sodium oxide, . 

 Pho.^phoric acid. 



4.26 

 .91 

 .66 

 .38 



.86 

 traces. 



