| . ay 1 | 
pola ee iad a ree 
| CHART) 3, LOT 1011 LOT 10 
Ration: rghit 
| Period ls | Perio@ 
‘Rolled Oats 28.9 Rolle¢ ms 
ae | 
| 
| 
“a j 
wd Pane. Po ion 
ee ' 
fA. Four 
Weeks 
ee 3. Lot1,011. These records illustrate the fact that an improvement in the protein content 
of the diet by the inclusion of 10 per cent of casein, in a mixture of wheat, maize, 2nd oats, does not 
enable the animals to grow. While it is a matter of importance in determining the vitality of the 
animals that the protein mixture in this ration be improved and that more of the fat-soluble A be 
added, the experiments here described emphasize the fundamental importance of having a satisfac- 
tory mineral content in the diet. 
Lot 1,012. These records are of special interest when compared with the preceding charts. In 
Period 1, the mixture of wheat, maize, and oats was improved with respect to proteix by the addition 
of casein, and fat-soluble A by the addition of butter fat. Although no growth was possible on this 
mixture because of the lack of sufficient calcium, sodium, and chlorine, growth was extremely rapid in 
Period 2 when these salts were added. This result is doubtless due in some measure to the mainte- 
nance of vitality in Period 1 of Lot 1,012, better than in Period 1 of Charts 1 and 2, in all of which 
experiments more than one dietary factor was operating at the same time to depress the vitality of 
the animals. 
