125 



pounds. The seven pigs suckling the corn-fed sow gained 

 33 pounds; the other lot gained 39 pounds. 



GROUND COVVPEAS AND CORN VERSUS GROUND 



CORN ALONE. 



At the conclusion of the grazing experiment just noted ^ 

 the same pigs weie used in another experiment closely related 

 in aim to the preceding. 



Lot L was continued on an exclusive corn ration. Lot II. 

 received equal weights of corn and shelled cowpeas. The 

 • food for both lots was ground, and both lots were kept in 

 covered pens, with small yards adjoining. 



After the usual preliminary period of one week, the ex- 

 periment proper was begun Nov. 4, 1897, and continued until 

 Jan. 3, 1898. 



During this period of 70 days the results were as fol- 

 lows : 



Ground corn versus ground cowpeas and corn. 



* The nutritive ratio of a food is the ratio of the digestible nitro- 

 genous matter contained in it to tlie sum of the digestible fats, sugars, 

 starch and other non-nitrogenous organic matter. The d!ge.stibility of 

 cowpeas was assumed to be the same as that of Canada field peas. 



The above table shows that the gain made was much 



greater with the mixed ration of corn and cowpeas than with 



corn alone. It required to make one pound of growth more 



than 8 pounds of ground corn fed alone; less than 5^ pounds^ 



of the mixed grain produced the same result. 



