PHOSPHATIC SLAG. 

 547. Received from Waltham, Mass. 



Per Cent. 



Moisture at 100° C, 1.67 



Potassium oxide, * 



Phosphoric acid (total), 15.70 



Calcium oxide, 39.24 



Insoluble matter, 9.91 



Material was represented as imported from England. 



BLEACHERY REFUSE. 



548-549. I- Received from Bondsville, Mass. 

 II. Received from Bondsville, Mass. 



Moisture at 100^ C. 

 Potassium oxide. 

 Phosphoric acid, 

 Calcium oxide, 

 Sodium oxide. 

 Insoluble matter. 



MEAT MEAL, AND BLOOD AND BONE. 



550-551. I- Received from Boston, Mass. 



II. Received from Concord, Mass. 



Per Cent. 

 I. II. 



Moisture at 100° C, 3.22 4.25 



Ash, 8.55 * 



Nitrogen, 9.23 5.72 



Phosphoric acid, 3.08 14.08 



TANKAGE AND GROUND BONE. 



552-555. I- Received from Concord, Mass. 



II. Received from Northborough, Mass. 



III. Received from South Deerfield, Mass. 



IV. Received from Boston, Mass. 



* Not determined. 



