268 AGRICULTURAL EXPERIMENT STATION. [Jan. 

 Trade Values of Fertilizing Ingredients, etc. — Concluded. 



Cents 

 por I'ljund. 



Organic nitrogen in medium bone and tankage, . . 9 



Organic nitrogen in coarse bone and tankage, . . 7 

 Organic nitrogen in hair, horn shavings and coarse 



fish scraps, . 7 



Phosj^horic acid soluble in water, (jj 



Phosjihoric acid soluble in ammonium citrate, . . (3 



Phosj^horic acid in fine bone and tankage, ... (j 



Phosphoric acid in fine medium bone and tankage, . 5 



Phosiihoric acid in medium bone and tankage, . . -i 



Phosj^horic acid in coarse bone and tankage, ... 3 

 Phosphoric acid in fine-ground fish, cotton-seed meal, 



linseed meal, castor pomace and wood ashes, . . 5 

 Phosphoric acid insoluble (in ammonium citrate) in 



mixed fertilizers, . 2 



Potash as high-grade suljDhate, and in mixtures free 



from muriate, 5J 



Potash as muriate, 4J 



The manurial constituents contained in feed stuffs are 

 valued as follows : — 



Cents 

 per Pound. 



Organic nitrogen, 17J 



Phosphoric acid, ,5 



Potash, 5^ 



The organic nitrogen in superphosphates, special manwes 

 and mixed fertilizers of a high grade is usually valued at the 

 highest fi2:ures laid down in the trade values of fertilizing 

 ingredients in raw materials, namely, fifteen and a half cents 

 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. The 

 insoluble phosphoric acid is valued in this connection at two 

 cents. 



The above trade values are the figures at which, in the six 

 months preceding March, 1893, the respective ingredients 

 could be bought at retail for cash in our large markets, in 

 the raw materials, which are the regular source of supply. 



They also correspond to the average wholesale prices for 

 the six months ending March 1, plus about twenty per cent. 



