202 



MANURE. 



248. But rich as are the liquid evacuations of the stable 

 and cow-yard, they are surpassed by those of the farmer's 

 own dwelling, especially when it is considered with what 

 ease these last may be saved. According to Dr. Thomson, 

 1000 parts of this substance, the human liquid evacuation, 

 contain 42^ lbs. nearly of salts, which are, 



Sal-ammoniac, 459 



Sulphate of potash, . . , . .2.112 



Muriate of potash, 3.674 



Common salt, 5.060 



Phosphate of soda, 4.267 



Bone-dust, (phosphate of lime,) , . , .209 



Acetate of soda, 2.770 



IJrate of ammonia, ..... .298 



Urea with coloring matter, .... 23.640 



42.489 

 957.511 



Water, 



There is scarcely a single element in this liquid which is 

 not an essential ingredient of plants. 

 In every 100 lbs. 

 Of cattle urine, are . . .4. lbs. of urea. 



Of horse urine, 

 Of human urine, 

 Of sheep urine. 

 Of hog urine, . 



.70 

 2.36 

 2.80 

 5.64 



It is at once seen how valuable are swine as manufacturers 

 of manure. 



It will be noted, that by the table (247), pigs' urine, like 

 human, contains phosphates, of which the urine of the ox, 

 horse, and sheep, are destitute, or contain traces only. 

 Hence pigs' urine is more valuable than that of horses and 

 cattle, not only by its urea, but by its salts. 



