193 
TABLE X. 
Showing Lffect of the Period of Lactation on the Milk Fats. 
— 
Reichert- | Soluble Insoluble 
TIME. Meissl | Acids Acids. 
Number. | Per Cent. Per Cent. 
IIS TASER 5 3 selene Bhat Eo aie Ee OIE Cccp eae Ie PS ; 36.68 8.20 86.76 
ZeeMODU =o = speckle Mahe cence Bed shetafetrots 35.75 8.09 | 86.74 
3d month ...... Ac Eis ENE, Morte ack RN MEE 33.19 7.59 $6.99 
PULA Hee aes =a snl atone 5) Set Ae e aac 33.80 7.56 5 86.95 
OUNNMONU Deir sts wcieies Mane Seah a wn Rarcues hae | 33.63 i : 7.47 | 87.10 
6th month. . ‘me " i seen a ia! 33.57 soy 755 G 86.94 
7th ee. Es Laie eke! ar BEE ee, Si 32.72 23 7.49 86.99 
(ShillY (ETA), eR Oey Rene eaten aren es ae 2 RM atahut a Parma ste 31.63 7.25 87.41 
9th month......... SRA SEES he OH Ge RTT aE Ts NOR Neer 31.98 7.10 87.50 
MEE ON We Mere nis a eerie astte eee is Reiner E.G 82.03 7.12 87.46 
HIT TAO TUNG Ge oat GOCE ERRNO Dice cee ok area a ecm aE eee | 26.64 6.50 88.20 
ADAM OHL DMP tas Seite toate Ae ar ataed. shee ocrasch ake | 30.48 8.£6 | 87.69 
The data in Tables IX and X represent results of experiments with three cows whose period of lactation com- 
menced in October and November respectively. They were fed on a uniform ration throughout the entire period 
of lactation with the exception that in July (the 9th month after calving) they were turned out on pasture. 
The above tables clearly show that the soluble fatty acids are highest 
immediately after parturition, or at the beginning of the period of lacta- 
tion. Slight irregularities excepted, they decreased as the period of lac- 
tation advanced and were lowest toward the close of the period of lacta- 
tion. 
It so happens that in most localities the majority of the cows drop 
their calves in late spring, at a time when they also change from dry 
feed to succulent pasture. This explains why in early summer both the 
per cent of volatile fatty acids and the per cent of oleic acids increase 
and the melting point decreases. 
[ 13—28003 } 
