88 MANURES. 



The Liquid Manure contains the nitrogenous parts of 



the digested food, and tlia 

 soluble parts of the ash. 

 The Bkeath contains tliose parts of the fully di- 

 gested food which contain 

 carbon, hydrogen, and oxy- 

 gen, but no nitrogen, or at 

 least a very inconsiderable 

 quantity of it. 



CHAPTER III. 



WASTE OF MANURE, 



The loss of manure is a subject which demands most 

 serious attention. Until within comparatively few 

 years, little was known of the true character of 

 manures, and consequently of the importance of 

 protecting them against loss. 



The chief causes of waste are 'evaporation and 

 leaching. 



EVAPORATION. 



Evaporation is the changing of a solid or liquid 

 body to a vapory fonn. Thus common smelling 

 salts, a solid, if left exj^osed, passes into the atmos- 

 phere in the form of a gas or vapor. "Water, a liquid, 

 evaporates, and becomes a vapor in the atmosphere. 



