THE VALUE OP PIG MANURE. 141 



and as the manure from a ton of clover hay is worth 

 $9.04, we may calculate that every hundred pounds of 

 pork so produced, leaves us $4.82 worth of manure. 



When pigs are fed skimmed milk, we shall probably 

 not be far wrong in estimating that the manure made in 

 producing 100 Ibs. of pork is worth $5.00. 



Taking these four estimates together, and striking a 

 mean, we have the following result : 



Value of manure in producing 100 Ibs. of pork from Indian corn $1.78 



" " ' " " " " Peas 3.56 



" " " " Clover ; 4.82 



" " " " " " Skimmed Milk 5.00 



Average of the whole $3.79 



In other words, where pigs are fed on clover and 

 skimmed milk during the summer, and are afterwards fat- 

 tened on half peas and half corn, we may calculate that 

 every pound of pork sold, leaves on the farm 3 3 1 4 cents' 

 worth of manure. 



It must be borne in mind that these are gold prices, and 

 also that this is merely the value of the manure made by 

 the pigs from the food consumed. The litter and other 

 materials thrown into the pen have not been taken into 

 the account. The pig cannot be credited with the manure 

 so obtained. If we throw into the pen 100 Ibs. of pea or 

 bean straw, we add about 19 cents to the value of the 

 manure heap ; but this is not derived from the pig, but 

 from the straw ; and so it is with anything else thrown 

 into the pen. The pig converts it into manure, but adds 

 nothing to its value. The pig creates nothing. Whatever 

 of value there is in the manure heap is derived from the 

 food consumed, and from the materials used as litter. 

 And yet it is nevertheless true, that we can obtain from 

 the pig pen a large amount of valuable manure that other- 

 wise would be wasted. 



On farms, we have seldom time to attend to such mat- 

 ters, and there is not as great a necessity for it ; but per- 



