EXPERIMENT STATION. 



527 



Fish and PotasJi. 



[Sent on for examination from Medfield, Mass.] 



Moisture at 100^ C 



Total phosphoric acid, 



Soluble i^hosphoric acid (8 cents per pound), 

 Reverted phosphoric acid (7| cents per pound), 

 Insoluble phosphoric acid (3 cents per pound). 

 Potassium oxide (4^ cents per pound), . 

 Nitrogen (17 cents per pound), 

 Insoluble matter, 



Valuation per 2,000 lbs.. 



I'er cenl. 



23.58 

 6.26 

 3.58 

 1.33 

 1.35 

 3.24 

 3.07 

 1.90 



%-2\ 73 



HigJi Grade. Sujjerphosjjhale. 



[Sent on from Boston, Mass.] 



Moisturd at 100" C, . 

 Total phosphoric acid, . 

 Reverted phosphoric acid. 

 Soluble ijhosphoric acid, . 

 Insoluble phosphoric acid, 

 Sulijhuric acid, . 

 Calcium oxide, . 

 Oxides of alumina and iron, 

 Magnesium oxide. 

 Insoluble matter. 



I'er cent. 



5.03 



25.36 



15.23 



0.25 



9.88 



0.22 



0.70 



24.95 



0.10 



18.91 



Valuation per ton of 2,000 lbs., 



129 18 



German HigJi Grade Superj^hosphate. 



[I. Sent on from New York City, N. Y., by a Boston manufacturer of fertilizers. 

 II. Sent on from Boston, Mass.] 



