Z MAINE STATE COLLEGE 



Cts. 

 per lb. 



Nitrogen in ammonia salts 17 



nitrates 14i 



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



in cotton seed meal and castor pomace 15 



in fine bone and tankage 16J 



in fine medium bone and tankage 13 



in medium bone and tankage 10£ 



in coarser bone and tankage 8£ 



in hair, horn shavings and coarse fish scrap 8 



Phosphoric acid, soluble in water 8 



in ammonium citrate 7£ 



in dry ground fish, fine bone and tankage... 7 



in fine-medium bone and tankage 6 



in medium bone and tankage 5 



in coarser bone and tankage 4 



in fine ground rock phosphate 2 



Potash as high-grade Sulphate and in forms free from Muriate (or 



Chlorides) 6 



as kainite 4& 



as muriate 4£ 



"These trade values are the average prices at which in the six 

 months preceeding March the respective ingredients could be 

 bought at retail for cash in our large markets, Boston, New York 

 and Philadelphia, 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 1st, plus about 20 per cent, in 

 case of goods for which we have wholesale quotations." 



The Valuation of Superphosphate and Mixed Goods. 



These trade values are applied to the valuation of Superphos 

 phates and all mixed goods, as follows : 



It is assumed that the organic nitrogen of these goods has for 

 its source such materials as dried blood, ground fish, or nitroge 

 nous substances of equally good quality, unless a special examina- 

 tion of some particular brand shows that inferior material like leather 

 has been used. Organic nitrogen in mixed goods is therefore 

 valued at seventeen cents per pound. The nitrogen present in 

 nitrates and ammonia salts is reckoned at fourteen and one half 

 and seventeen cents respectively. 



The insoluble phosphoric acid of mixed fertilizers is considered 

 as coming entirely from bone, and not from South Carolina rock, 

 and is reckoned at three cents per pound. 



The potash is valued at the price of that ingredient in kajnite 



