ELEMENTS, SYMBOLS, AND ANALYSES. 275 



51. Kainit Average of 3 Analyses. 



Moisture at 100 C. . . 9.26 Magnesium oxide . . . 8.97 

 Potassium oxide . . . 14.04 Sulphuric acid .... 21.05 



Sodium oxide .... 21.38 Chlorine 32.38 



Calcium oxide .... 1.12 Insoluble matter . . . 0.89 



52. Land-Plaster or Gypsum. 



Hydrated sulphate of lime 74.88 



Matters insoluble in acid 1.23 



Moisture 1.18 



Other matters chiefly carbonate of lime 22.66 



53. Ashes (Wood), Unleached. 



Moisture at 100 C 15.72 



Calcium oxide 28.61 



Magnesium oxide 3.00 



Ferric oxide 1.03 



Potassium oxide 8.72 



Phosphoric acid 0.32 



Insoluble matter, before calcination 18.49 



" after " 12.12 



54. Ashes (Wood), Leached. 



Moisture at 100 C 13.72 



Calcium oxide 48.07 



Magnesium oxide 6.06 



Ferric oxide 0.68 



Potassium oxide 1.92 



Phosphoric acid 1.79 



Insoluble matter, before calcination 5.49 



" after " 2.57 



55. Coal Ashes, Bituminous. 



Water 5.0 Soda 0.4 



Organic substance . . . 5.0 Magnesia 3.2 



Ash 95.0 Phosphoric acid ... 0.2 



Potash 0.4 Sulphuric acid .... 8.5 



