13 



Reverted phosphoric acid, 1.72 7.72 1.38 4.68 5.98 



Insoluble phosphoric acid, 1.54 .26 .02 10.34 1.92 



396. DAMARALAND GUANO. 



Per cent. 



Moisture at 100° C, 17.70 



Organic matter, 25.63 



Total ash, 56.67 



Total nitrogen, 5.79 



Nitrogen in form of ammoniates, 1.80 



Nitrogen in form of nitrates, .05 



Nitrogen in form of organic matter, 3.94 



Carbonic acid, Trace 



Total phosphoric acid, 14.78 



Soluble phosphoric acid, 4.90 



Reverted phosphoric acid, 5.79 



Insoluble phosphoric acid, 4.09 



Total potassium oxide, 3.53 



Potassium oxide soluble in water, 3.46 



Sodium oxide, 7.03 



Calcium oxide, 14.21 



Magnesium oxide, 2.05 



Iron and aluminium oxides. Trace 



Sulphuric acid, 5.94 



Chlorine, 5.77 



Insoluble matter, 9.26 

 The results of our analysis are fairly within the stated composition 



of the sample (200 pound bag) kindly sent on for trial by Messrs. 

 H. J. Baker & Bro., of New York. The Guano, it is stated has 

 been brought from some islands off the west coast of Africa ; it is a 

 valuable material, as ma}^ be seen from our detailed analysis. 



