428—431. WOOD ASHES. (Canada.; 



I. and II. Sent on from Boston, Mass. 



III. Sent on from Sunderland, Mass. 



IV. Sent on from Concord, Mass. 



Moisture at 100° C. 



Phosphoric acid, 



Magnesium oxide, 



Calcium oxide, 



Potassium oxide. 



Insoluble matter (before cal.) 9.80 

 ^'- '■'• (after cal.) 

 Nos. 1, 2 and 4 are uuleached Canada ashes ; the large amount of 

 moisture and of insoluble matter in No. 4 explains its lower percent- 

 age of potash. Sample No. 3, is a partially leached ash. 



432. GROUND BONE. 



Sent on from Concord, Mass. 



Per Cent. 



Moisture at lOO'' C, 3.05 



Total Phosphoric acid, 17.72 



Reverted " "■ 7h cts. per pound, 5.55 



Insoluble '' •' 4 cts. '' 12.17 



Nitrogen, 15 cts. " 5.15 



Insoluble matter, 1.19 



Valuation per 2000 lbs., $33.52 



433. SALTPETER WASTE. 



Sent on from .South Acton, Mass. 



Per Cent. 



Moisture at 100 '^C, 2.71 



Sodium oxide, 45.92 



Potassium oxide, 4i cts. per pound, 6.11 



Calcium oxide, .71 



Sulphuric acid, .84 



Nitrogen in nitric acid, 16 cts. per pound, .80 



Chlorine, 56.00 



Valuation per 2000 lbs., $7.75 

 The sample contained less nitric acid and more potash than previous 

 samples. 



