The Peoduction of Manttke. 



181 



Food Consumed and Excrement Recovered. 



Length of experiment in days 



Weight of pigs 



Pounds of food consumed 



Pounds of nitrogen consumed 



Pounds of phosphoric acid consumed . 



Pounds of potash consumed 



Pounds of excrement recovered 



Pounds of nitrogen recovered 



Pounds of phosphoric acid recovered . 



Pounds of potash recovered 



Pounds of excrement recovered per day 



per 1,000 lbs. live weight of animal 

 Value of excrement per day per 1,000 



lbs. live weight of animal 



Value of manure per ton 



Value of excrement per ton 



Number op ExPKRIMB^fT. 



206 

 4 



2 



330 

 3 

 1 



7 

 412 

 ,5 



,698 

 .29 

 ,589 

 ,5 



,217 

 .70 

 ,534 



108.9 



$ .2106 

 3.47 

 4.21 



2. 



256 

 4 

 2 



342 

 3 

 1 



7 

 459 

 ,98 

 ,723 

 ,27 

 ,624 

 ,25 

 ,481 

 .45 

 .472 



75.8 



,186 



,46 



.46 



3. 



7 

 333 

 151. 

 1.34 

 .59 

 .322 

 130.75 

 1.33 

 .48 

 .323 



56.2 



$ .104 

 2.94 

 4.45 



Analyses or Manure. 



The seemingly high value of the excrement recovered per day in 

 experiments 1 and 2 was due to the ricli nitrogenous food which went 

 to make up the ration during these experiments. As nitrogen is by far 

 the most costly of the fertilizing constituents a comparatively slight 

 increase in this element will materially increase the value of the excre- 

 ment. About one-third of the ration exclusive of skim milk fed these 

 pigs consisted of meat scrap, a commercial article obtained from the 

 fertilizer manufacturers at a cost of thirty-five dollars per ton and 



