Food for 'pi^g averajre of the two trials shows that well-fed cows, 



yielding milk heavily, may be counted upon to return nearly 



178 ten cents' worth of valuable fertilizing materials per day, 



and the last trial shows that the liquid excrement is of 



equal value with the solid. 



The determination of the amount of excre- 

 ment was made by carefully collecting the 

 manure made by the ten horses in the University barn during 

 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 for Average per 



Jl Days. Horse per Day. 



Nitrogen, pounds 16.27 • ^5 



Phosphoric acid, pounds 13-50 ■^- 



Potash, pounds 32-53 - 30 



Nitrogen, value ^2 . 44 $0.02 



Phosphoric acid, value 81 .01 



Potash, value i .46 .01 



Total i^4-7i -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, 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 



