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centages of sweet potatoes I used those of Irish potatoes in 

 calculating the nutritive ratio in all rations where sweet po- 

 tatoes were used. 



Pig No. I., during the entire feeding period of 105 days, 

 received daily, 1 1-3 lbs. of ground corn; 1 2-3 lbs. of ground 

 cow peas, and 2 1-10 lbs. of sweet potatoes. The nutritive 

 ratio based on the pig weighing 125 lbs. is 1:4.2. The pig 

 gained 73 lbs. at a cost of 6 4-5 cents per lb. It required 

 7 1-3 lbs. of the ration mixture (just as fed) to make 1 lb. of 

 gain. This ration is too small in quantity ; 2 lbs. of corn, 

 2^ lbs. of cow peas and 3 lbs. of sweet potatoes would 

 make a ration in proportion to the size of the pig. 



Pig No. II., from April 28th to August 11th (105 days), re- 

 ceived d&ilj 1 1-3 lbs. ground corn ; 1 2-3 lbs. of ground cow 

 peas and 2 1-10 lbs. of sweet potatoes. With the average 

 weight of the pig at 84 lbs. the nutritive ratio is 1:4.6. The 

 pig gained 71 lbs. in 105 days at a cost of 7 cents per lb. 

 It required 7^ lbs. of the ration mixture (just as fed) to 

 make 1 lb. of gain. This ration is the same as that for 

 pig No. I. ; but this pig being smaller makes the ration 

 slightly less in quantity than that which is required. 



Pig No. III., from April 28th to June 2d (35 days), re- 

 <5eived daily 1 1-5 lbs. of ground corn; 1-| lbs. of ground 

 cow peas; 1 4-5 lbs. of green oats. With the average 

 weight of the pig at 65 lbs., the nutritive ratio is 1:4.7.. 

 The cost of 1 lb. of gain is 6 cents. It required 8 2-3 lbs. 

 of the ration mixture to make one pound of gain. The 

 pig gained 17| lbs. in 35 days. 



Pig No. III., from June 2d to Aug. 11th (70 days), was fed 

 daily 1 3-5 lbs. of ground corn ; 1 3-5 of ground cow peas, 

 and 2 2-5 lbs. of green sorghum. With the average weight 

 of the pig at 90 lbs. the nutritive ratio is 1:5.1. The pig 

 gained 34 lbs. at a cost of 8 2-3 cents per lb,, or 11 2-3 lbs. 

 of the ration mixture. 



Pig No. IV., from April 28th to Juue 2d (35 days), re- 

 ceived daily 1 4-5 lbs. of cow peas ; 1 4-5 lbs. of green oats, 

 and 1 4-5 lbs. of green sorghum. The average weight of 



