Experiment Station Report. 



139 



Sumac. Waste Material from Tanneries in Peahody^ Mass. 



[Sent on for tbe Massachusetts Society for Promoting Agriculture.] 



Moisture at 100° C 63.06 



Organic matter, 36.94 



Nitrogen in organic matter 1.19 



Crude ash in organic matter, 6.80 



Calcium oxide in ash, 1.14 



Magnesium oxide in ash, 3.25 



Potassium oxide in ash, .17 



Phosphoi'ic acid, .17 



Insoluble matter in ash, .... ... 2.25 



The nitrogen, potash and phosphoric acid contained in the 

 above article, represent a commercial value of $4.64 pel 

 ton of 2,000 pomids. 



The tanning principle was so completely abstracted, that 

 a composting with some air-slacked lime promises to render 

 the material quite valuable as a manurial substance for light 

 soils, deficient in organic matter. 



Fresh Water Mud. 



[Little Pond at South Braintree. Sent on by A. Drew, Esq., Boston, Mass.] 



Analysis ot a fairly dried sample : — 



The material in its natural state contains 72 per cent, 

 water ; in its composition it resembles a fibrous peat, yet it 

 is less humified, and will yield its nitrogen, etc., more 

 readily. One ton of the analyzed material represents a 

 commercial value of from $5 to $6. 



