COMMERCIAL FERTILIZERS. 



215 



Bowker's Lawn Dressing. 

 (Collected by E. A. Thompson, Woburn, Mass.) 



Guaranteed composition : total phosphoric acid, 6 to 8 

 per cent. ; soluble and reverted phosphoric acid (available), 

 5 to 6 per cent. ; potassium oxide, 4 to 5 per cent; nitro- 

 gen, 4 to 5 per cent, (equivalent to ammonia, 4.5 to 5.5 per 

 cent.). 



Moisture at 100° C, . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, 

 Nitrogen (in organic matter) , 

 Nitrogen (in ammonia salts). 

 Insoluble matter. 



Per cent. 

 5.33 

 9.92 

 5.73 

 1.93 

 2.26 

 5.52 

 1.19 

 3.28 

 5.65 



Valuation per two thousand pounds : — 



114.6 pounds of soluble phosphoric acid, 

 38.6 pounds of reverted phosphoric acid, 

 45.2 pounds of insoluble phosphoric acid, . 



110.4 pounds of potassium oxide, . 

 23 8 pounds of nitrogen (in organic matter), 

 65.6 pounds of nitrogen (in ammonia salts), 



$45 63 



Bay State Bone Super pliosphate. 

 (J. J. Tucker, Boston, Mass. ; collected of G. B. Knowlton, Fitchburg, Mass.) 



Guaranteed composition : soluble and reverted phosphoric 

 acid (available), 9 to 10.5 percent.; insoluble phosphoric 

 acid, 1.5 to 3 per cent. ; ammonia, 3 to 4 per cent, (equi- 

 valent to nitrogen, 2.5 to 3.3 per cent.). 



Moisture at 100° C, . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Nitrogen, .... 

 Insoluble matter, 



Per cent. 



22.45 



10.95 



8.80 



.71 



1.44 



3.12 



4.25 



