146 INVESTIGATION IN MILK PRODUCTION. 
The first week the cow received daily 3.811 pounds of 
nutriment available for product and yielded 1.452 pounds 
of butter fat. It has been shown that the normal require- 
ments for a pound of butter fat is 6.25 pounds of nutriment 
and on this basis the nutriment available for product pro- 
vided for only .609 of a pound of butter fat and her daily 
yield was .843 of a pound in excess. During the 70 days 
covered by the table she received daily on an average 6.516 
pounds of net nutriment and yielded 1.603 of butter fat— 
being adaily yield in excess of that provided forin the ration 
of .561 of apound. Since she decreased in weight on an aver- 
age 2 pounds per day, the excess yield of butter fat was .28 
of a pound for each pound of body weight sacrificed, or a de- 
crease of 3.57 pounds body weight to a pound of excess 
yield of butter fat. 
The record of the 15 cows that came into milk from and 
after the 11th of November also gives some evidence in re- 
gard to the amount the daily yield of butter fat is increased 
by virtue of the milking down of body weight, and the re- 
lation between the dailv decrease in weight and excess yield 
of butter fat. 
TABLE LXV.—Showing Decrease in Weight, Daily Average Yield of Butter 
Fat, Normal and Excess Above Normal Yield. 





Net Butter Daily Normal Daily 
Week Weight Nutriment Fat Yield Excess Yield 
Daily Daily Butter Fat | Butter Fat 
1st 2.8) 0) ns ne eecococed mn Nl WEEE iaccceriaco: © ell es wccscscros «all @ 8  aadccts 
2nd DLT, 4.648 1.369 744. 620 
3rd 900 5.363 1.325 858 467 
4th 877 5.989 1:295 .958 337 
5th 873 6.156 1.259 985 274: 
6th 863 6.500 1.232 1.040 192 
7th 865 6.390 1.202 1.022 180 
8th 858 Gro 1.159 1.042 118 
9th 853 6 535 a lia Eo) 1.045 O75 
DailiynAera Sein, cccsessecuse 6.011 1.245 .962 .283 





