3^0 
Journal of Agricultural Research voi. xxiv, no. s 
4. FROM MIXKD MII,K OF GRAD]® HOI^TBINS F^D A NORMAI^ RATION, 
WITH AND WITHOUT THE ADDITION OF VARIOUS OIUS AND FATS 
Four grade Holsteins of similar age, comparatively fresh in lactation, 
were divided into two groups, known as herds A and B. All of the cows, 
except Samantha III, had been used in previous experiments. The 
same hay and grain mixtture was fed throughout the experiment to both 
herds, but Colantha was reduced 2 pounds of grain in the last period. 
Herd B received, in addition, various oils and fats in four periods. The 
hay and various grains in the mixture were of fair average quality, as 
shown by analysis (Table XXI). The coconut fat was a refined product 
said to be used in the manufacture of confectionery, and the peanut and 
com oils were refined for salad purposes. The soybean oil was the ordi¬ 
nary commercial product. They were all analyzed (Table XXII) by 
the common methods but were not esterified. 
The milk produced was the daily average for the three days on which 
cream was saved for chtuming. The milk analyzed was a five-days' 
composite taken at substantially the same time as the cream sample. 
Table XX .—Records of cows and milk analysis 
Herd A. 
Herd B. 
Colantha. 
Samantha IV. 
Colantha H. 
Samantha HI. 
Date of birth. 
Last ball dropped. 
Condition on calving. 
Dote served.... 
Grade Holstein.... 
Nov. x6,19x3. 
Dec. 5, 19x9; Feb. 
4. Mar. X4, X93a 
Grade Holstein.... 
Aug. 35. X9X4..— 
Aug. 30 . X9X9. 
Good flesh.. 
Dec, 4. X 9 Z 0 . 
Grade Holstein.... 
Oct X4. X 9 X 4 - 
Aug. & X 9 X 9 . 
Good flem. 
Nov. 3. X9X9.. 
Grade H^stein 
Aug. 35. Z923 
Sept. X3. X9X9. 
Good flesh. 
Dec. 8 . X9X9. 
PERIOD I 
Sample No. 
Daily ration: 
Hay. 
Grain mixture. 
Gluten feed, 40 per 
cent. 
Wheat bran. 20 per 
cent. 
Barley meal, 40 per 
cent. 
Weight of animal. 
Milk produced (daily 
average). 1 
Milk analysis: 
Solids (^avimetric).... 
Fat (Babcock). 
Proteids (NX6.as). 
Lactose (by difference). 
Ash. 
Sample No. 
Weight of animal. 
Milk produced (daily 
average).^ 
Milk analysis: 
Solids (gravimetric).... 
Fat (Babcock). 
Proteids (NX6.a5). 
Lactose (by difference). 
Ash. 
Ai . 
Ai . 
Bi . 
9i| pniinHs ... 
94 pounds. 
aa pounds . 
TO pounds... 
xo pounds. . . 
xo pounds . 
x,348 pounds . 
Nov. 18 to 20,1919. 
29.6 pounds. 
X2.66 per cent.... .. 
4.23 percent.. 
3.27 per cent. 
4.39 per cent... 
.77 per cent.i. 
x,x6o pounds. 
Nov. x8 to 20,1919, 
34.7 pounds. 
X2.84 per cent. 
4.50 per cent . 
3.0s per cent . 
4.60 per cent . 
.69 per cent . 
2>o93 pounds . 
Nov. x8 to 20, X9X9, 
3X.4 pounds 
X3.a9 per cent . 
4.60 per cent . 
3.29 per cent . 
4.69 per cent . 
.71 per cent . 
A* . 
As ... 
Bs . 
x,3o 8 pounds . 
Nov. 27 to 29,1919, 
34.6 pounds. 
X2.65 per cent . 
4,43 per cent . 
3.4.3 per cent . 
4.00 per cent . 
0.79 per cent . 
x,2J5 pounds . 
Nov. 27 to 29,19x9, 
31.6 pounds. 
12.91 per cent . 
4.50 per cent . 
3.09 per cent . 
4.63 per cent . 
0.69 per cent . 
1,083 pounds. 
Nov. 27 to 29,1919, 
31.0 pounds. 
X3.10 per cent. 
4.38 per cent. 
3.35 per cent. 
4.64 per cent. 
0.73 per cent. 
Bi. 
a4 pounds. 
10 pounds. 
x.aio pounds. 
Nov.x8toao.1sx9, 
29.2 pounds. 
23.35 per cent. 
4.58 per cent 
3.48 per cent 
4.44 per cmt. 
•75 per cent. 
Bt. 
X.X83 pounds. 
Nov.37 to as, 1919 
35.3 pounds. 
13-35 per cent. 
4.48 per cent 
3.58 per cent. ^ 
4.54 per cent. 
0.7 s per cent. 
For the days cream was saved for churning. 
