4 MAINE STATE COLLEGE 



Cts. 

 Per lb. 



Phosphoric acid, soluble in water 8 



in ammonium citrate 7h 



indry ground fish, fine bone and tankage. 7 



in tine-medium bone and tankage 6 



in medium bone and tankage 5 



in coarser bone and tanlvage 4 



in tine ground rock phosphate 2 



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



Chlorides) 6 



as kainite 4i 



as muriate 4^ 



"These trade values are the averaoe 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." 



These trade values which are based upon data collected in other 

 states are adopted for Maine partly because of our easy access to 

 the Boston market, the prices of which control our own markets, 

 and partly because there is too little trade in raw materials in this 

 State to allow any safe calculation of retail prices, 



THE VALUATION OF SUPERPHOSPHATES 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 

 nitrogenous substances of equally good quality, unless a special 

 examination of some particular brand shows thai inferior material 

 like leather has been used. Organic nitrogen in mixed goods will 

 therefore be valued at nineteen cents per pound. The nitrogen 

 present in nitrates and ammonia salts will be reckoned at 

 seventeen and nineteen cents respectively. 



The insoluble phosphoric acid of mixed fertilizers is considered 

 as coming entireW 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 kainite 

 and the muriate, unless the chlorine present in the fertilizer is not 

 sufficient to combine with it, in which case the excess of potash is 

 reckoned at the price of the sulphate. 



