354 



BOARD OF AGRICULTUEE. 



C A. Bartletfs Ground Bones. 

 (Collected of C. A. Bartlett, Worcester, Mass.) 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



9.6 i^ounds of soluble phosphoric acid, 

 142.2 poimds of reverted phosphoric acid, 

 395.2 pounds of insoluble phosphoric acid, . 

 47.8 pounds of niti'ogen, .... 



Per cent. 



6.18 

 27.35 



.48 



7.11 



19.76 



2.39 



.23 



$0 77 



10 67 



19 76 



7 17 



$38 37 

 RandalVs Field and Farm. 

 (Collected of J. J. Stanley, Lawrence, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 14 

 per cent. ; available phosphoric acid, 8 to 10 per cent. ; po- 

 tassium oxide, 2 to 3 per cent. ; ammonia, 2\ to 3^ per 

 cent, (equivalent to nitrogen, 2 to 2.9 per cent.). 



Per cent. 



16.43 

 7.84 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



4.73 

 1.65 

 1.46 

 2.16 

 1.85 

 2.58 



Valuation per two thousand pounds : — 



94.6 pounds of soluble phosphoric acid, 

 33. pounds of reverted phosphoric acid, 

 29.2 pounds of insoluble phosphoric acid, . 

 43.2 jjoirnds of potassium oxide, . 

 37. pounds of nitrogen, .... 



$19 06 

 Sparrow's B. B. Supe^'jAosphates. 



(Collected of G. W. Atkinson, Reading, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 12 

 per cent. ; available phosphoric acid, 8 to 10 per cent. ; po- 



