May 5, X933 
Fatty Acids in Butter Fat 
371 
3. FROM THE MILK OF SINGLE ANIMALS, GRADE HOLSTEINS AND GRADE 
JERSEYS, FRESH, intermediate, AND LATE IN LACTATION, FED NORMAL 
RATIONS 
The cows were grades, the Jerseys on the average were appreciably 
older, but all had freshened within a few weeks. Cecile II was the 
same cow used the year previous. The Holsteins were a 4 per cent strain 
of fair milk yield. Fancy III, although a high-grade Jersey, did not 
produce as rich milk as many of that breed. 
In the sampling of milk and cream there was an interval of four 
months ^ between the so-called fresh and intermediate periods of lactation 
and an additional three months ^ to the late period, during which time 
the milk yield decreased nearly 32 per cent in the Holsteins and 28 
per cent in the Jerseys, and in general the percentages of solids and fat 
increased but not as consistently as might have been expected. 
The same grain mixture and similar hay were fed throughout the 
different lactation periods, but the amounts varied as stated. Analysis 
of the hay and various grains indicates their quality (Table X). 
Tabi,^ Vll.—Records and analysis of milk from cows fresh in lactation 
Colantha. 
Samantha IV. 
Cecile 11. 
Fancy III. 
Breed. 
Date of birth. 
Last calf dropped.. 
Condition on calving:_ 
Date served.. 
Weight of animal.. 
Daily ration; 
Hay. 
Grain mixture. 
Cottonseed meal, 20 
per cent. 
Gluten feed, 20 per 
cent. 
Wheat bran, 30 per 
Grade Holstein.,.. 
Nov. 16,1913. 
Aug. 20,1918. 
Good flesh. 
Dec. 9,1918. 
1.19s poimds. 
Grade Holstein.... 
Aug. 25,1914. 
Oct. 6,1918. 
Good flesh. 
Nov. IS, 1918. 
1,1X3 pounds. 
Grade Jersey, 
Dec. x8,191a. 
Aug. 26,1918. 
Thin. 
Jan. 9,1919... 
713 pounds.,, 
26 pounds. 
12 pounds. 
24 pounds 
12 pounds. 
18 potmds. 
8 pounds. 
Grade Jersey. 
Aug. IX, 1908. 
Oct. 12,1918. 
Thin. 
Mar. 26,10x9. 
863 pounds. 
22 pounds. 
9 pounds. 
cent. 
Com feed meal, 30 
per cent. 
Milk produced (daily 
average). * 
Milk analsrsis: 
Solids (gravimetric).... 
Fat (Babcock)... 
Proteids (NX6.25). 
Lactose (by difference). 
Ash. 
Sept. 23 to 26,19x8, 
33.S pounds. 
12.47 per cent. 
3.93 per cent. 
3.X2 percent. 
4.69 per cent. 
• 73 percent. 
Oct. 31 to Nov. 3, 
19x8,41.4 potmdi. 
12.80 per cent. 
4.38 per cent. 
3.02 per cent. 
4.69 per cent... 
. 71 percent. 
Sept. 23 to27,1918, 
33.7 pounds. 
14.43 per cent. 
5.20 percent. 
3.66 per cent. 
4.8s per cent. 
. 72 per cent. 
Oct. 31 to Nov. 3, 
1918133.5 pounds. 
12.50 per cent. 
4.18 percent. 
3.06 per cent. 
4.51 percent. 
. 75 per cent. 
1 For the days cream was saved for churning. 
Table VIII .—Records and analysis of milk from cows intermediate in lactation 
Colantha. 
Samantha IV. 
Cecile II. 
Fancy III. 
Weight of animal . 
Daily ration: 
Hay. 
1,280 pounds. 
24 pounds. 
1,163 pounds. 
22 pounds. 
753 pounds. 
x8 pounds . 
878 pounds. 
20 pounds, 
xo pounds. 
Jan. 30 to Feb. 2, 
19x9,39.8 potmds. 
X3.00 per cent. 
4.80 per cent. 
3.X0 per cent. 
4.40 per cent. 
. 70 per cent. 
Grain mixture. 
Milk produced (daily 
average).» 
Milk analysis: 
Solids (gravimetric)... 
Fat (Babcock). 
Proteids (NX6.25). 
Lactose (by difference). 
Ash. 
X3 pounds. 
Jan. 26 to 29,19x9, 
27.9 pounds. 
12.84 per cent. 
4.28 per cent. 
3.32 per cent . 
4.52 per cent . 
. 72 per f^ent..._ 
X3 pounds . 
Jan. 30 to Feb. 2, 
1919^ 33.6 pounds. 
12.66 per cent . 
4.2s per cent . 
3.07 per cent . 
4.68 per cent . 
- 66 per cent. 
8 pounds . 
Jan. 36 to 39,19x9, 
16.7 pounds. 
15.52 P«r cent . 
6.13 per cent . 
4.X0 per cent . 
4- 58 per cent . 
. 71 per cent., 
1 
* For the days cream was saved for churning. 
< Approximate length of ocr'^d 
