102 Revort or THE DEPARTMENT OF ANIMAL HUSBANDRY OF THE 
RELATIVE EFFICIENCY AND ECONOMY OF THE RATIONS FOR HENS. 
About 13 per ct. more food was eaten and 31 per ct. more eggs 
were laid by Lot X VII having the ration containing animal meal 
than by Lot XVIII. During the thirty-two weeks the average 
~ egg production per hen was 110.1 eggs for Lot XVII and 84 
eges for Lot XVIII. Eggs from both lots averaged about the 
same in weight. The amount of dry matter in the food for each 
pound of eggs produced was 3.7 pounds for Lot XVII and 4.3 
pounds for Lot XVIII. The cost of food for each pound of eggs 
produced was the same for both lots, 4.1 cents, and the food cost 
per dozen eggs was 5.9 cents. 
Lot XIX ate nearly 15 per ct. more food than Lot XX and 
laid over 86 per ct. more eggs. During the twenty-eight weeks 
the average egg production per hen was 72.7 for Lot XIX and 
53.3 for Lot XX. The eggs from Lot XIX averaged somewhat 
larger. The amount of dry matter in the food for each pound 
of eggs produced was 4.8 pounds for Lot XIX and 5.5 pounds 
for Lot XX. The cost of food for each pound of eggs produced 
was 4.8 cents for Lot XIX and 5.2 cents for Lot XX. The food 
cost per dozen eggs was 7.8 cents for Lot XIX and 7.9 cents for 
Lot XX. With these two lots of older hens which had not been 
under the effect of similar rations before the experiment began 
there was no difference in the laying noticeable during the first 
twelve weeks, but after the cumulative effect of the rations be- 
gan to be felt the superiority of the one ration for sustained egg 
production became more evident. <A study of the tabulated data 
will show this. 
With the two lots of younger birds, which had been since 
hatching under the influence of somewhat similarily contrasted 
rations, the difference in egg production was apparent from the 
start. This difference was even more noticeable after several 
months although the lot having the animal food had been laying 
longer under the influence of the preliminary rations before this 
experiment began. For short periods during part of the laying 
