374 
Journal of Agricultural Research 
VoL XXIV, No. s 
Tabi,iS XIII .—Analysis of butter fat from cows late in lactation 
Saponification number { s ) .(mgm.).. 
Acid number (a).(mgm.).. 
Ether number { e ) .(mgm.).. 
lodin number. 
Equivalent in oleic acid.... (per cent).. 
Total fatty acids (T) (1.00—0.00022594 e) 
.(per cent).. 
Neutralization number (w) {sjT) 
...(mgm.).. 
Free fatty acid (A) a/n.(per cent).. 
Soluble fatty acids (S) (T—I) 
.(per cent).. 
Neutralization ntunber.(mgm.).. 
Insoluble fatty acids (/) by alcoholic 
potash.(percent).. 
Neutralization number.(mgm.).. 
Stearic acid by crystalization 
.(per cent).. 
Glycerol (0.00054703 e) .(per cent).. 
Colantha. 
Samantha 
IV. 
CecUe II. 
Fancy III. 
224. 626 
2.440 
222. 186 
36. 241 
40.313 
225. 709 
2. 701 
223. 008 
33 - 649 
37 - 430 
230. 834 
3. 161 
227. 673 
26. 952 
29. 980 
231* 259 
2.432 
228. 827 
29. 472 
3 *. 783 
94 - 980 
94. 961 
94. 856 
94.830 
236. 498 
1.032 
237. 686 
1.136 
243*352 
I. 299 
» 43 . 867 
•997 
6. 509 
519- 511 
6.577 
519- 340 
7. 232 
516. 081 
7. 526 
527. ro6 
88.471 
215. 676 
88. 384 
216. 727 
87. 624 
220. 842 
87.304 
219.450 
21.628 
12.154 
20. 399 
12.199 
21.033 
12. 454 
21. 5x2 
IS. S18 
The percentages of total fatty^ adds were 94.971 in the Holsteins and 
94.843 in the Jerseys,^ and thdr neutralization numbers 237.092 and 
243.610 mgm., respectively. The percentages of free fatty acids were 
1.084 1.148. Tlie percentages of soluble fatty adds were 6.543 
7.379, and their neutralization numbers 519.426 and 521.594, which were 
appredably high. Tlie percentages of insoluble fatty adds were 88.428 
and 87.464, and their neutralization numbers 216.202 and 220.146. 
The percentages of glycerol were 12.177 and 12.486, which was deddedly 
low in the Holsteins. 
The Holsteii^ further exceeded the Jerse)^ in total and insoluble fatty 
adds, with a still greater difference in neutralization number of the insol¬ 
ubles. The Jerseys mdntained a high soluble add content and only a 
moderate loss of glycerol. 
The Holsteins exceeded the herd sample (Table I) in total and insolu¬ 
ble fatty acids by a larger amount than in the previous period and with 
a greater loss in neutralization number of the insolubles and of glycerol. 
The Jerse3rs again av^aged practically the same as the herd sample 
except for an appredable loss in neutralization number of the insolubles. 
TABtB XIV .—Weight and analysis offractions of milk from cows fresh in lactation {ethyl 
esters ) 
COLANTHA 
Fraction No. 
Range of 
fraction. 
Weight of 
fraction. 
Saponification 
number. 
lodin number. 
Ethyl oleate. 
•c. 
±701085 
85 to 145 
145 to 190 
190 to 230 
230 to 278 
278 to 310 
31010328.5 
Gm. 
Mgm. 
“ 1.472.835 
398.375 
361.366 
283.442 
242.332 
214.019 
197*332 
Per cent. 
3................. 
s .... 
6. 
7 . 
Total. 
5.6846 
5.1990 
3.8515 
13.9373 
57.5422 
128.4525 
214.6671 
2.098 
4*514 
10.292 
14.268 
19.080 
26.687 
2.565 
5.520 
12.586 
17.448 
23.331 
32.634 
o Total alkali'consuming power the fraction. 
