COMMERCIAL FERTILIZERS. 



217 



Valuation per two thousand pounds : — 



121.6 pounds of soluble phosphoric acid, 

 16.8 pounds of reverted phosphoric acid, 

 54. pounds of insoluble phosphoric acid, 

 82.6 pounds of potassium oxide, . 

 32. pounds of nitrogen (in organic matter), 

 4.6 pounds of nitrogen (in ammonia salts), 

 14.8 pounds of nitrogen (in nitrates), . 



$13 38 



$33 60 



Bone Superjjhosphate. 

 (Lowell Bone Fertilizer Co. ; collected of R. C. Lord, Lowell, Mass.) 



Guaranteed composition : moisture, 5.9 per cent. ; solu- 

 ble phosphoric acid, 14.68 per cent. ; reverted phosphoric 

 acid, .32 per cent. ; insoluble phosphoric acid, .86 per cent. ; 

 nitrogen, 3.37 per cent. 



Per cent. 

 Moisture at 100° C, 10.45 



otal phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Nitrogen, .... 



Valuation per two thousand pounds : 



233.8 pounds of soluble phosphoric acid, 

 79.4 pounds of reverted phosphoric acid, 

 7.4 pounds of insoluble phosphoric acid, 

 6.4 pounds of nitrogen, 



16.03 



11.69 



3.97 



.37 



2.82 



$25 72 



6 35 



44 



12 97 



$45 48 



Bradley''s XL Animoniated Bone Superphosphate. 

 (Collected of Garfield and Proctor, Fitchburg, Mass.) 



Guaranteed composition : soluble phosphoric acid, 7 to 8 

 per cent.; reverted phosphoric acid, 2 to 3,percent. ; in- 

 soluble phosphoric acid, 2 to 3 per cent. ; potassium oxide, 

 2 to 3 per cent. ; nitrogen, 2.5 to 3.25 per cent. 



