90 



FARM MANURES, AND SIMILAR MATERIALS 



Water . . . 

 Organic substance 

 Ash .... 

 Nitrogen . . . 

 Potash . . . 

 Soda .... 



Human feces, fresh 



772.0 Lime 6.2 



198.0 Magnesia 3.6 



29.9 Phosphoric acid 10.9 



10.0 Sulfuric acid 0.8 



2.5 Silica and sand 1.9 



1.6 Chlorine and fluorine .... 0.4 



Human urine, fresh 



Water 963.0 



Organic substance .... 24.0 



Ash 13.5 



Nitrogen 6.0 



Potash 2.0 



Soda 4.6 



Lime . 0.2 



Magnesia 0.2 



Phosphoric acid 1.7 



Sulfuric acid 0.4 



Chlorine and fluorine .... 5.0 



Sewage (Samuel Rideal) 

 1000 tons of London crude sewage 



Ammonia 



Phosphoric acid (soluble) 



Phosphoric acid (insoluble) 



Potash 



LB. 

 219 



51 " 



Aualyses of Fruit and Garden Products, with Reference to their Ferti- 

 lizing Constituents (Wolff and Goessmann) 



One thousand parts of the plants contain in pounds : 



