98 AGRICULTURAL EXPERIMENT STATION. [Jan. 



cannot otherwise but benefit, ultimately, both farmers and 

 manufacturers. 



The market reports of centres of trade in New England, 

 New York and New Jersey, aside from consultations with lead- 

 ing manufacturers of fertilizers, furnish us the necessary infor- 

 mation regarding the current trade value of fertilizing ingredi- 

 ents. The subsequent statement of cash values in the retail 

 trade is obtained by taking the average of the wholesale quo- 

 tations in New York and Boston during the six months preced- 

 ing March 1, 1886, and increasing them by 20 per cent., to 

 cover expenses for sales, credits, etc. 



These trade values, except those for phosphoric acid, soluble 

 in ammonium citrate, were agreed upon by the Experiment 

 Stations of Massachusetts, Connecticut and New Jersey for use 

 in their several States for the present season. 



Trade Values of Fertilizing Ingredients in Raw 

 Materials and Chemicals. 



Cents per 



Nitrogen in ammonia salts, 



Nitrogen in nitrates 



Nitrogen in dried and fine-ground fish, 



Organic nitrogen in guano and fine-ground blood and meat, . 

 Organic nitrogen in cotton seed, linseed meal, and in castor pomace 



Organic nitrogen in fine-ground bone, 



Organic niti'Ogen in fine medium bone, 



Organic nitrogen in medium bone, 



Organic nitrogen in coai'se medium bone, 



Organic nitrogen in coarse bone, horn shavings, hair, and fish scraps 



Phosphoric acid, soluble in water, 



Phosphoric acid, soluble in ammonia citrate,* .... 

 Phosphoric acid, insoluble in dry, fine-ground fish and in fine l)one 

 Phosphoric acid, insoluble in fine medium bone, 

 Phosphoric acid, insoluble in medium bone, .... 

 Phosphoric acid, insoluble in coarse medium bone, . 



Phosphoric acid, insoluble in coarse bone, 



Phosphoric acid, insoluble in fine-ground rock phosphate. 



Potash as high grade sulphate, 



Potash as kainite, 



Potash as muriate, 



1886. 



Pound. 



181 



18i 



17 



17 



17 



17 



15 



13 



11 



9 



8 



7i 



' 2 



7 

 6 

 5 

 4 

 3 

 2 

 51 



41 



* Dissolved from two grams of phosphate, unground, by 100 cc. neutral solution of 

 ammonia citrate, sp. gr. 1.09, in 30 minutes at 65 deg. C, with agitation once in five min- 

 utes, commonly called " reverted " or " backgone " phosphoric acid. 



