294 



CHEMICAL MANUEES. 



It would be necessary still to describe a large number of nitrogen- 

 ous wastes, for substances of animal or vegetable origin when they 

 are damaged and otherwise unutilizable may always be used for fche 

 manufacture of manure ; but as these substances rarely occur on the 

 market in sufficient quantity, it will suffice to indicate them with a 

 richness in phosphoric acid and potash. 



1 The nitrogen in several of these nitrogenous manures is more than 

 usually high, almost double that of ordinary commercial samples, e.g. meat meal, 

 greaves, etc. No table like this is a guide to the composition of any given 

 sample on the market, the real value of which actual analysis can alone decide. 

 — Tr. 



