the last trial shows that the liquid excrement is of equal value Food for 

 with the solid. Plants 



The determination of the amount of 2I3 



excrement was made by carefully collecting Horses, 

 the manure made by the ten horses in the University barn dur- 

 ing the time they were in the stable, for a period of eleven 

 days, including one Sunday. During this time the bedding 

 used was also weighed and separately analyzed. The horses 

 were mostly grade draft horses of about 1,400 pounds weight, 

 doing heavy work and liberally fed on oats and hay. Dur- 

 ing the eleven days of the experiment 3,461 pounds of clear 

 excrement of the following percentage composition was 

 voided : 



Nitrogen 47 per cent. 



Phosphoric acid 39 



Potash 94 " 



Value per ton $2.79 



The amount and value of the fertilizing materials 

 would, therefore, be: 



10 Horses Average per 



for n Days. Horse per Day. 



Nitrogen, pounds 16.27 *$ 



Phosphoric acid, pounds *3-5 -12 



Potash, pounds 32.53 .30 



Nitrogen, value $2.44 $0.02 



Phosphoric acid, value .81 x .01 



Potash, value 1.46 .01 



Total $4.71 .043 



The horses, therefore, returned in the manure during the 

 time that they were in the stable rather more than four cents 

 each per day, in about thirty-two pounds of excrement. 



For this trial, tight galvanized iron 

 pans, covering the whole surface of the pen, sheep, 

 were used; the sheep were kept continuously upon them, and 

 enough weighed straw bedding of known composition was 

 used to keep them dry and clean. The sheep were grade 

 Shropshires, of medium size, and were fed on grain, beets, 

 and hay. The experiment lasted for thirty-three and two- 

 thirds days with three sheep, during which time 923 pounds 



