ANALYSES. 241 



per cent, of " Soluble Phosphates," but as to the 

 amount of phosphoric acid in the " Soluble Phos- 

 phates " we are left entirely in the dark. Again, 

 we are informed that the superphosphate con- 

 tains 7 per cent, of " Salts of Potash/' but as 

 to the amount of potash we remain uninformed. 

 By referring to our analyses, the reader will no- 

 tice less than one per cent, of potash, and by 

 converting this potash into the sulphate or mu- 

 riate, he will obtain less than two per cent., which 

 shows a great discrepancy in the analyses. We 

 quote the following from the circular of these 

 manufacturers : 



" With their increased facilities, improved machinery, and 

 skilled workmen, under the superintendence of 



DR. G. A. LIEBIG, 



who personally selects and tests every article used in its manu- 

 facture, and is constantly present at the works and directs 

 every department, is a sufficient guarantee that its manufac- 

 ture can be relied upon as being equal to anything which can 

 be produced. 



" The company continues to use the celebrated 



NAYASSA PHOSPHATE, 



(the richest phosphatic guano now known) which, together 

 with the other ingredients, and its careful preparation, produce 

 those prompt and permanent effects which have uniformly been 

 shown upon all crops upon which it has been applied." 



