64 UNIVERSITY OF WISCONSIN STUDIES 
than in the beginning of the lactation period which is exactly 
the reverse of that found when the animals are in a fat con- 
dition, 
TABLE II—SHOWING FAT CONTENT NORMAL TO LOW IN BEGINNING 
OF LACTATION PERIOD 
Cows Moderate to Thin in Flesh 
Time No. 57 No. 215 No, 304 No. 59 No. 55 No, 307 
after calving 
Weeks : 
hn eres pene ie) 
2 3.0 
3 3.2 
£ 3.2 3.15 
5 4.0 3.1 
6 4.4 3.2 
i 4.7 3.2 
3 4.5 3.0 
" 4.2 3.2 
10 5.6 3.2 
i es 3.2 i 
2 4.6 3.30 | 
Months 
4 5G 3.2 4.0 5.6 4.7 3.30 
5 a8 Leal 5.2 
6 5.8 3.5 5.3 
vi 5.2 3.4 5.3 
‘ 5.3 3.6 5.0 
9 5.5 238 5.1 
10 5.1 3.2 
11 5.1 229 
5 nn aterener ere es Jed 
Year 5.33 3.29 4.01 5.11 lS |aswtiwaenais 
We are also able to present data showing the effects of 
underfeeding upon the fat percentage are not confined to the 
interval immediately following calf birth. Table III gives 
the results for Jersey Cow 62 beginning at a point 96 days 
in milk. It will be seen that there was almost an immediate 
rise in the fat percentage when the ration was reduced below 
the requirements and that the fat declined again as soon as 
the ration was raised. 
