1888.] 



PUBLIC DOCUMENT — No. 33. 



161 



Nitrate of Soda. 



Sulphate of Magnesia. 



[Sent on from Amherst, Mass.] 



Ter cent. 



Moisture at 100" C, 29.01 



Magnesium oxide, 15.87 



Sulphuric acid, 30.35 



Insoluble matter, 6.29 



Ammonite. 



[Sent on from Soutbanipton, Mass.] 



Per cent. 



6.17 

 9.56 

 12.20 

 3.40 

 0.22 



Moisture at 100° C, .... 



Ash, 



Nitrogen (17-J- cents per pound), 

 Phosphoric acid (6 cents per pound), . 

 Insoluble matter, 



Valuation per 2,000 pounds, $47 50 



The matcriul was in a fine mechanical condition, and thus 

 in a favorable form for speedy disintegration. 



Saltpetre Waste. 



[Sent on from South Acton, Mass.] 



Per cent. 



Moisture at 100° C 2.71 



45.92 

 6.11 

 0.71 

 0.84 

 0,80 

 56.00 



Sodium oxide, ...... 



Potassium oxide (4| cents per pound). 



Calcium oxide, 



Sulphuric acid, 



Nitrogen in nitric acid (16 cents jser pound). 

 Chlorine, 



Valuation per 2,000 jioirnds, 



$7 75 



