283 



The experiment extended from December 19 to May 9, nearly five 

 months, and was divided into fonr periods of five weeks each. Lots 1 

 and 3 received corn during the first two periods, silage and corn during 

 the third, and silage alone the fourth. Lots 2 and 4 received silage the 

 first period, silage and corn the second, and corn alone the third and 

 fourth periods. The following statement summarizes the plan: 



Thus the effects of silage alone or silage and corn were alternately 

 compared with those of corn on each two lots of pigs during each half 

 of the experiment, the rations being so arranged that the transition 

 from silage alone to corn alone was gradual, and vice versa. All the ani- 

 mals received the same average amounts of wheat bran and middlings 

 in addition to the silage or corn during the whole trial. 



"The silage was of superior quality, finely cut, and made from corn ripe 

 enough to cut for husking. * * * The silage was never all swal- 

 lowed even when fed in very small quantities, although after the grain 

 had been eaten out the remainder was chewed. It was not possible 

 during this trial to separate and determine the amount not swallowed ; 

 so, although the figures show the amount fed, they are not absolute as 

 regards the amount eaten, but are, however, approximate and compar- 

 ative." 



The average dry matter eaten, gain in live weight, dry matter eaten 

 per pound of increase, gross and net cost of same, and value of the 

 manure, calculated for 100 pounds of live weight per day, are stated in 

 tabtUar form. The calculated cost of the rations fed is based on wheat 

 middlings at $20, wheat bran and corn at $1G, and silage at $1 per 

 ton. The pork was valued at 4t\ cents per pound, live weight. 



Averages per day calculated for each 100 pounds of live weight. 



Water-free 

 food eaten 

 per day. 



W^ater 



drank per 



day. 



Gain in 



live 

 weijrlit 

 per day. 



Water-free 

 food eaten per 



pound of 



gain in live 



weight. 



Gross cost 



of feed per 



pound of gain 



in live 



weight. 



Average for all with silage 



Average for all with corn and silage. 

 Average for all with corn (no silage) 



Pounds. 

 2.62 

 2.71 

 2.78 



Pounds. 

 7.90 

 6.56 

 6.81 



Pounds. 

 0.37 

 0.62 

 0.74 



Pounds. 

 7.08 

 4.37 

 3.76 



Cents. 



4.6.5 

 3.73 

 3.77 



"The results show that with silage rated so low as $1 per ton the 

 gross cost for production of pork was considerably more than its mar- 

 ket value when the i)roportion of silage was about 70 i^er cent of ibe 



