VALUE OF EXCREMENTS. 171 



The solid and liquid excretions taken to- 

 gether, will show the following annual value: 



Pig Excrements, solid and liquid, $ 4.62 



Horse " " " 19.73 



Cow " " " 8.07 



Sheep " " " 2.75 



Human " " " 3.66 



From these Tables, it is plain that too much 

 care cannot be exercised in preserving the excre- 

 ments of man and animals. Every pound of 

 ammonia that is lost or evaporates, represents 

 the amount required for a bushel of corn ; and 

 every pound of the urine of a horse or man, will 

 furnish sufficient ammonia for a pound of wheat; 

 arid two and a half pounds of the urine of man 

 will furnish the phosphoric acid, arid more than 

 half of the potash required for a pound of wheat. 



The foregoing Tables will also show the far- 

 mer the value of the manure, and its capacity 

 for raising crops, as estimated from the average 

 amount of stock kept on his farm. 



When we consider the great value of the 

 excretions of man and animals, it is astonishing 

 that so little attention is paid to preserving 

 them. These substances, which are compara- 

 tively lost in our large cities and towns, repre- 

 sent a value of millions of dollars annually. If 

 the average value of the excretions of the in- 

 habitants of large cities be set down at two 



12 



