184 



MASSACHUSETTS AGRICULTURE. 



The following figures from the same author show the constit- 

 uents of the urine of different animals and their comparative 

 value. 



One thousand pounds of fresh urine contain : — 



The following calculation by Stockhardt, shows approxi- 

 mately the value of the excrements which these animals furnish 

 in a year : — 



One cow furnishes yearly — pounds. vaiue. 



In excrements, . . . 20,000 X4 10 

 In urine, .... 8,000 410 



Total, . . . 28,000 8 11 

 One horse furnishes yearly — 



In excrements, . . . 12,000 4 10 



In urine, .... 3,000 250 



Total, 



15,000 



6 15 



