514 



BOAED OF AGRICULTUEE. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Niti'ogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



7.4 pounds of soluble phosphoric acid, 

 73.2 pounds of reverted phosphoric acid, . 

 76.6 pounds of insoluble phosphoric acid, . 

 171.2 pounds of nitrogen, .... 



Per cent. 



10.42 

 7.86 

 .37 

 3.66 

 3.83 

 8.56 

 1.13 



$0 59 

 5 49 

 2 30 



29 96 



$38 34 



The '■'•Lawrence Fertilizer " 



(Lee, Blackburn & Co., Lawrence, Mass.; collected of F. M. Victor, Lawrence, 



Mass.) 



Guaranteed composition : Total phosphoric acid, 12 to 14 

 per cent. ; potassium oxide, 2 to 3 per cent. ; nitrogen, 2 to 

 3 per cent. 



Moisture at 100° C, 

 Total phosphoi'ic acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Niti'Ogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



195.2 pounds of soluble phosphoric acid, 

 45.2 pounds of reverted phosphoric acid, 

 4.40 pounds of insoluble phosphoric acid, 

 33.6 pounds of potassium oxide, . 

 60.0 pounds of nitrogen. 



Por cent. 



16.12 

 12.24 

 9.76 

 2.26 

 .22 

 1.68 

 3.00 

 1.05 



$31 07 



Chround Bone. 



(Lee, Blackburn & Co., Lawrence, Mass. ; collected of F. M. Victor, Lawrence, 



Mass.) 



No guaranty obtained. 



