328 AGRICULTUEAL EXPERIMENT STATION. [Jan. 

 Trade Values of Fertilizing Ingredients^ etc. — Concluded. 



Organic nitrogen in medium bone and tankage, 

 Organic nitrogen in coarse bone and tankage, 

 Organic nitrogen in hair, horn sliavings and coarse 



fish scrai^s, 



Phosphoric acid soluble in water, .... 

 Phosphoric acid soluble in ammonium citrate. 

 Phosphoric acid in iine bone and tankage, 

 Phosphoric acid in fine medium bone and tankage, 

 Phosphoric acid in medium bone and tankage. 

 Phosphoric acid in coarse bone and tankage, . 

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



linseed meal, castor jiomace and wood ashes, . 

 Phosphoric acid insoluble (in ammonium citrate) in 



mixed f ei'tilizers, 



Potash as high-grade sul^jhate, and in mixtures free 



from muriate, 



Potash as muriate, 



Cents 

 per Pound. 



12 



7 

 6 



H 



3 

 2 



5i 

 44 



The manurial constituents contained in feed stufl's are 

 valued as follows : — 



Cents 

 per round. 



Oi'ganic nitrogen, 15 



Phosi^horic acid, 5 



Potash 5 



The organic nitrogen in superpJiosphates, special manures 

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

 highest figures 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, 1894, the respective ingredients 

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

 the raio 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. 



