224 Report of the Chemist of the 



trade values of plant-food elements in raw materials 



and chemicals. 



Tlie trade values in the following schedule have been agreed 

 upon by the Experiment Stations of Massachusetts, Rhode Island, 

 Connecticut, New York, New Jersey and Vermont, as a result of 

 study of the prices actually prevailing in the large markets of 

 these states. 



These trade values represent, as nearly as can be estimated, the 

 average prices at which, during the six months preceding March, 

 the respective ingredients, in the form of unmixed raw materials, 

 could be bought at retail for cash in our large markets. These 

 prices also correspond (except in case of available phosphoric acid) 

 to the average wholesale prices for the six months preceding March 

 plus about 20 per ct. in case of goods for which there are whole- 

 sale quotations. 



Trade Values of Plant-Food Elements in Raw Matekials and Chemicals. 



1899. 



Cts. per 



pound. 



Nitrogen in ammonia salts 15 



Nitrogen in nitrates ; . 12 V^ 



Organic nitrogen in dry and fine-ground fish, meat and blood, and 



mixed fertilizers 14 



Organic nitrogen in cotton-seed meal and castor-pomace 12 



Organic nitrogen in fine-ground bone and tankage 14 



Organic nitrogen in coarse bone and tankage 10 



Phosphoric acid, water-soluble 4^ 



Phosphoric acid, citrate-soluble 4 



Phosphoric acid in fine-ground fish, bone and tankage 4 



Phosphoric acid in coarse fish, bone and tankage 2 



Phosphoric acid in cotton-seed meal, castor-pomace and wood ashes.. 4 

 Phosphoric acid in mixed fertilizers, insoluble in ammonium citrate 



and water 2 



Potash as high-grade sulphate, in forms free from muriates (chlor- 

 ides ) , in ashes, etc 5 



Potash in muriate 4% 



COMPARISON OF SELLING PRICE AND COMMERCIAL VALUATION. 



Giving to the different constituents the values assigned in the 

 schedule for mixed fertilizers, it 4? c&ats a pound for nitrogen, 4^ 



