tradp: values in superphosphates, special 



manures and. mixed fertilizers of 



high grade. 



The organic nitrogen in these classes of goods will be valued at 

 the highest figure laid down in the Trade Values of Fertilizing Ingre- 

 dients in Raw Materials, namely 17.5 per pound, it being assumed 

 that the organic nitrogen is derived from the best sources, viz. : 

 animal matter as meat, blood, bones or other equally good forms, 

 and not from leather, shoddy, hair, or any low-priced inferior form of 

 vegetable matter, unless the contrary is ascertained. 



Insoluble Phosphoric acid will be valued at 3 cents, it being 

 assumed, unless found otherwise, that it is from bone or similar 

 source and not from rock phosphate. In this latter form the insol- 

 uble phosphoric acid is worth but 2 cents per pound. Potash is 

 rated at 4^ cents, if sufficient chlorine is present in the fertilizer to 

 combine with it to make muriate. If there is more Potasli present 

 than will combine with the chlorine, then this excess of Potash will 

 be counted as sulphate. To introduce large quantities of chlorides, 

 common salt, etc., into fertilizer, claiming sulphate of potash as a 

 constituent, is a practice, which in our present state of information 

 will be considered of doubtful merit. The use of the highest trade 

 values is based on the opinion that these articles ought to contain the 

 most efficient forms of fertilizing ingredients. 



In most cases the valuation of the ingredients in Surperphosphates 

 and Specials falls below the retail price of these goods. The differ- 

 ence between the two figures, represents the manufacturer's charges 

 for converting raw materials into manufactured articles. These 

 charges are for grinding and mixing, bagging or barreling, storage 

 and transportation, commission to agents and dealers, long credits, 

 interest on investment, bad debts, and finally profits. 



Local disadvantages for transportion, exert not nnfrequently a 

 serious influence on the cost of one and the same brand of fertilizers. 

 Binding rules cannot be laid down regarding these points. Farmers 

 must judge for themselves whether the differences between our valu- 

 ation and the prices asked for is a fair one, considering local condi- 

 tion of supply. 



The prices stated in these bulletins in connection with analyses of 

 commercial fertilizers refer to their cost per ton of 2,000 pounds, on 

 board of car or boat near the factory, or place for general distribu- 



