490 BOAED OF AGRICULTURE. 



community in a clear and intelligent appreciation of the 

 substances for manurial purposes. 



Consumers of commercial manurial substances do well to 

 buy, whenever practicable, on guaranty of composition with 

 reference to their essential constituents ; and to see to it that 

 the ])ill of sale recognizes that point of the bargain. Any 

 mistake or misunderstanding in the transaction may be 

 readily adjusted, in that case, between the contending parties. 

 The responsibility of the dealer ends with furnishing an 

 article corresponding in its composition with the lowest 

 stated quantity of each specified essential constituent. 



BrigJitman's Dry Fish. 

 (Collected of F. G. Arnold, Swansea, Mass.) 



Guaranteed composition : Total phosphoric acid, 7 to 9 

 per cent, (bone phosphate of lime, 15 to 20 per cent.) ; 

 ammonia, 10 to 12 per cent, (equivalent to nitrogen, 8.2 to 

 9.9 per cent.). 



rer cent. 



Moisture at 100° C, 9.17 



Total phosphoric acid, 7.92 



Soluble phosphoric acid, .64 



Keverted phosphoric acid, 4.36 



Insoluble phosphoric acid, 2.92 



Nitrogen, 8.73 



Insoluble matter, 2.69 



Valuation per two thousand pounds : — 



12.8 pounds of soluble phosphoric acid, . . . f 1 02 



87.2 pounds of reverted phosphoric acid, . . . 6 64 



58.4 pounds of insoluble lihosphoric acid, . . . 1 75 



174.6 pounds of nitrogen, 30 56 



?39 87 



Cleveland's Superphosphate. 



(Cleveland Dryer Company, Cleveland. O. ; collected of E. W. Foster, Tewksbury, 



Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 13 

 per cent. ; soluble phosphoric acid, 6 to 7 per cent. ; re- 

 verted phosphoric acid, 2 to 3 per cent. ; insoluble phos- 

 phoric acid, 2 to 3 per cent. ; potassium oxide, 3 to 4 per 



