88 



EXCREMENTS AND URINE. 



Of these analyses, that only of the excrements of 

 the sheep admits a strict comparison of the ^lid 

 with the fluid matter excreted, because both were 

 collected at the same time from one and the same 

 animal ; which w^as not the case in the others. A 

 very striking difference is found in the excretions of 

 the hog, whose urinary constituents appear of ex- 

 tremely small value when contrasted with those of 

 the faeces ; a fact explained by the great difference 

 in the foddering of the animals concerned in the ex- 

 periments. 



On the action and value of the several ingredients 

 of manure in general, the most important informa- 

 tion has been already communicated in the preced- 

 ing section; here, therefore, it is necessary to add 

 only the following observations : — 



