312 BOARD OF AGRICULTURE. 



VI. 



Muriate of Potash. 

 (H. L. Phelps, Northampton, Maes.) p . 



Moisture at 100° C 7.60 



Potassium chloride 81.82 



Sodium chloride 16.36 



Insoluble matter 20 



vn. 



Muriate of Potash. 

 (D. A. Horton, Northampton, Mass.) _ 



Moisture at 100° C 1.40 



Potassium chloride . . . . . . .81.80 



Sodium chloride ........ 16.38 



Insoluble matter 42 



Nos. I., II., III., of the above-stated samples, consist of a 

 mixture of potassium chloride and potassium sulphate ; IV. 

 and V. are inferior grades of muriate of potash; VI. and 

 VII. are fair representatives of the last-named article. 

 Some of these salines contain a considerable admixture of 

 magnesium chloride (IV., V.), and ought to be carefully 

 used for reasons repeatedly stated in previous reports. The 

 safest course consists in their early application, to allow the 

 passage of the objectionable admixtures to the subsoil. 



Crude Sulphate of Magnesia (Kieserite). 

 (F. J. Kinney, Worcester, Mass.) 



Moisture at 100° C 26.22 



Magnesium oxide 17.10 



Sulphuric acid 39.54 



Chlorine .• 2.07 



Sand, &c 2.17 



M 



This material, which contains also some soda compounds, 

 sells at from fourteen dollars to fifteen dollars per ton. It 

 may serve as a valuable absorbent of ammonia in stables and 

 elsewhere. 



Gypsum (Nova Scotia). 



Per cent. Per cent. 



Calcium oxide 32.60 32.77 



Sulphuric acid 46.75 44.64 



Insoluble matter ..... .85 3.50 



