158 AGRICULTURAL EXPERIMENT STATION. [Jan. 



The above trade values are the figures at which, on March 

 1 , the respective ingredients could be bought at retail for 

 cash per pound in our leading markets 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 1, plus 20 per cent, in case of 

 goods for which we have wholesale quotations. The calcu- 

 lated values obtained l)y the use of the above figures will be 

 found to agree fairly with the reasonable retail price in case 

 of standard raw materials, such as : — 



Suljjliate of Ammonia, 

 Nitrate of Soda, 

 Muriate of Potash, 

 Sulphate of Potash, 

 Dried Blood, 

 Dried Ground IMeat, 



Dried Ground Fish, 



Azotin, 



Ammonite, 



Castor Pomace, 



Bone, 



Plain Superphosphates. 



TiiADE Values in Sltperpiiospiiates, Special Manuees 

 AND Mixed Fep.tilizers of High Grade. 



The orjjanic nitrogen in these classes of goods will be 

 valued at the highest figures laid down in the ' ' Trade Values 

 of Fertilizing Ingredients in Raw Materials;" namely, 17.5 

 cents per pound, it being assumed that the organic nitrogCR 

 is derived from the best sources, namely, 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. 



Insoluble phosphoric acid will be valued at three cents, it 

 being assumed, unless found otherwise, that it is from bone 

 or similar sources, and not from rock phosphate. In this 

 latter form the insoluble phosphoric acid is worth but two 

 cents per pound. Potash is rated at 4| cents, if sufficient 

 chlorine is present in the fertilizer to combine with it to 

 make muriate. If there is no more potash present than will 

 combine with the chlorine, then the excess of potash will be 

 counted as sulphate. To introduce large quantities of 

 chlorides, common salt, etc., into a fertilizer, claiming sul- 

 phate of potash as a constituent, is a practice which, in our 

 present state of information, will be considered of doubtful 



