— 155 — 



Let us now compute tliese losses in dollars and cents. A ton of 

 fresh horse manure would be worth at the present prices of com- 

 mercial fertilizers, $2.45 as follows : 



Nitrogen 51 per cent . . .10.2 lbs. at .17 . . . . $1.73 



Phosphoric acid .21 percent . . . 4.2 " .07 29 



Potash 53 per cent ... 10.7 " .04 43 



Total I2.45 



The manure that weighed at the beginning 529.5 pounds had 

 shrunk during the six months exposure to 372 pounds or 29.74 

 per cent. A ton diminished by this amount would leave 1404.2 

 pounds. This would contain fertilizing materials to the amount 

 of $1.42 as follows : 



Nitrogen 46 per cent . . .6.5 lbs., at .17 fr.io 



Phosphoric acid .15 percent ... 2.1 " .07 15 



Potash 31 per cent . . . 4.4 " .04 17 



Total ^r.42 



REC APITUI, ATIO N. 



Value of one ton of fresh horse manure ^52. 45 



Value of same after exposure for si.x; months 1.42 



Loss $1.03 per ton or 42 per cent* 



Loss of Mixed Manure by Leaching. 



For this experiment there was provided a galvanized iron box 

 about two feet .square and a little more than one foot deep. It 

 was furni.shed with a perforated bottom so arranged that the leach- 

 ings could be caught below in a pail. 



Our manure is ordinarily kept in a covered barn yard. A cut 

 of which is herewith shown. .The drawing is made to represent 

 the covered yard with one side cut awa}-. The temperature 

 in this yard seldom falls below the freezing point. The horse 

 manure is dropped down from above and spread evenly, the cow 

 manure is wheeled out from the side and likewise spread even- 

 ly. Both are mixed with sufficient absorbents of some kind to 

 take up all the liquid. The whole becomes firmly packed by the 

 tramping of the animals. From this mass there was ctit a block 

 that wotdd just fit into the .box above described. The manure 

 was put into the box without breaking it up, so that it remained 

 in the same condition as to compactness as it had been while in 



