HAY. 



367 



547 



985. 10,000 parts of Italian rye-grass in flower, 

 according to Way, contain 616 parts, and, in seed, 

 656 parts of inorganic matter. These ashes con- 

 tained in 10,000 parts — 



Silica 



Phosphoric acid 



Sulphuric acid 



Lime 



Magnesia 



Peroxide of iron 



Potash 



Soda 



Chloride of sodium 



As has been several times stated, the exact 

 relative proportions of these different constituents of 

 plants vary very considerably, depending on soil, 

 climate, manure, &c. Thus, for example, mangel- 

 wurzel root contains from 9 to 11 parts of inorganic 

 matter in every 1000 parts; or, abstracting the water, 

 from 87 to 150 parts in the dry root; hence it is easy 



