154 AMERICAN MANURES. 



should consider ourselves a party to the frauds 

 of the manufacturers in their attempts to reap 

 enormous profits by statements which both 

 science, experiments and observation prove to 

 be false. Insoluble phosphoric acid, exceeding 

 3 or 4 per cent, in any manufactured superphos- 

 phate, is proof positive of ignorance of the re- 

 quirements of his business, cupidity or dis- 

 honesty, or it may be all three, on the part of 

 the manufacturer. 



Some manufacturers in giving analyses of their 

 fertilizers, use the term " Soluble Bone Phos- 

 phate." There is no such substance as soluble 

 bone phosphate. There is Bone Phosphate, and 

 14 parts of it equal only 6 '41 parts of phos- 

 phoric acid. By using the term " Soluble Bone 

 Phosphate," they desire to convey the impression 

 that the purchaser gets more than double the 

 amount of soluble phosphoric acid that he really 

 does. If the manufacturer uses the term " Solu- 

 ble Bone Phosphate," 51 cents is the measure of 

 value for it per lb., instead of 12 i cents, as for 

 phosphoric acid, and the farmer should be care- 

 ful in purchasing to note this. No honest 

 manufacturer who understands his business uses 

 the term. 



Ammonia and Nitrogen, as found in manures, 

 are technically called Actual Ammonia and Poten- 

 tial Ammonia. In most manures, and especially 



