466 



BOARD OF AGRICULTURE. 



Salt Mud. 



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

 [T. 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.] 



II. 



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 IOC C, 56.55 



Ash constituents, 30.60 



Insoluble in acids, 31 84 



Nitrogen in organic matter, .30 



Soluble constituents contained : — 



Sesquioxide of iron, 4.26 



Calcium oxide, .91 



Magnesium oxide, .66 



Potassium oxide, .38 



Sodium oxide, ,86 



Phosphoric acid, traces. 



