260 AMERICAN MANURES. 



sen on the Rhine, Rhenish Prussia, etc., and the results of their 

 investigations are communicated to the public from time to 

 time, in their respective agricultural papers. 



No. 1 ANALYSIS OF COPROLITE SUPERPHOSPHATE. 



Percentage. Equal to 



Soluble Phos-) in , -.-, 1A . 1Q (Superphosphate 

 phoric Acid, I { of Lime 



Insoluble Phos- "I Q , K . f Bone Phosphate 



phoric Acid, | I of Lime.' 



No. 2 ANALYSIS OF BONE MEAL SUPERPHOSPHATE. 



Percentage. Equal to 



Soluble Phos-) -, o fr . 1A 99 + rt 9/i (Superphosphate 

 phoric Acid, } ] {of Lime. 



Insoluble Phos- ) Q . /> 4 Q f Bone Phosphate 



phoric Acid, j 3 to 4 : to 8 j Qf Lime *. 



Nitrogen 0'5 to 1 



No. 3. ANALYSIS OF BAKER GUANO SUPERPHOSPHATE. 



Percentage. Equal to 



Soluble Phos-) = ( Superphosphate 



phoric Acid, j ( of Lime. 



Insoluble Phos-) c f Bone Phosphate 



phoric Acid, } 2 to 3 j Qf Lime ^ 



On comparing the above analyses of super- 

 phosphates made in Germany, with those made 

 by our boastful manufacturers, the reader will 

 notice that their lowest grade superphosphates 

 contain more soluble phosphoric acid than our 

 best., and that the insoluble phosphoric acid (3 to 

 4 per cent.) contained in those made at Man- 

 heim, is about equal to the average amount of 

 soluble phosphoric acid, in American commercial 

 manures. 



THE END. 



