CORN 143 
extend over a period of ten years. Eighteen separate tests 
were made, in which a total of 280 pigs were used. Bulletin 
145 gives a summary of the results. 
The feed required to produce 100 pounds of gain varied 
from 360 pounds to 820 pounds, the poorest gains being made 
in the case of young pigs, weighing 84 pounds when the trial 
began, which were fed upon corn alone, and the best gains for 
feed consumed were made by young pigs which were fed equal 
parts by weight of corn and middlings with a small allowance 
of skim-milk. 
The 140 pigs fed ground corn ate 5510 pounds more grain 
and made 2036 pounds more gain than the 140 pigs fed 
whole corn. 
The pigs fed whole corn consumed an average of 501 
pounds of grain for each 100 pounds of gain, and the pigs fed 
ground corn consumed 471 pounds of grain for each 100 
pounds of gain. 
Eleven trials out of the eighteen showed a saving from 
grinding, the amount saved varying from 2.5 per cent to 18.5 
per cent. The remaining seven trials showed a loss from 
grinding, the loss varying from 1.1 per cent to 11.1 per 
cent. 
The average of the eighteen trials shows a saving of 6 
per cent from grinding corn. 
Of the 140 pigs fed whole corn, 45 pigs gained more than 
the average, and 95 pigs gained less than the average. Of the 
140 pigs fed ground corn, 91 pigs gained more than the 
average, and 49 pigs gained less than the average. 
The authors of the bulletin point out that the economy of 
grinding corn will depend upon the price of corn and the cost 
of grinding, and the following table is given to assist the 
farmer in determining when to grind: 
