VALUATION OF FERTILIZERS, ETC. 465 



Sumac. Waste Material from Tanneries in Peabody^ Mass, 



The nitrogen, potash and phosphoric acid contained in the 

 above article, represent a commercial value of $4.64 pei 

 ton of 2,000 pounds. 



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 of a fairly dried sample : — 



Moisture at 100° C, 

 Calcium oxide, . 

 ]\Iagiie.siura oxide, 

 Potassium oxide, 

 Ferric oxide. 

 Phosphoric acid, 

 Kitrosren, , 



40.37 



1.27 



.29 



.22 



1.80 



.26 



1.37 



Insoluble matter, 18.26 



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. 



