366 
Journal of Agricultural Research 
Vdl, XXIV, No. 5 
and turned out into the yard for several hours every day for exercise, 
weather permitting. They were fed and milked twice daily, had access 
to water at all times, and in general received excellent care. 
The cream was separated by gravity (Cooley system) and churned 
as sweet as possible to preserve the several millangs required. The 
resulting butter fat was melted, filtered, and retained for analysis in 
glass-stoppered bottles in a partially darkened room. 
I. COMPOSITION OF BUTTER FAT 
I. FROM THE MIEK OF MIXED HERD, GRADE HOESTEINS AND GRADE 
JERSEYS, FED NORMAE RATIONS 
The analysis given in Tables I and II was published in the earlier 
article (7), but Sie percentage of oleic acid has been recalculated from 
the iodin number of the fat instead of from that of the insoluble acids, 
and the results are offered as probably typical of butter fat produced 
by grade animals under the care and feeding practiced at the experi¬ 
ment station. The figures may at least serve as a tentative basis for 
comparison in the other experiments. 
Table I. —Analysis of butter fat 
Saponification number {s) . (nigm.) 
Acid number (o)... (mgm.) 
Ether number (e) .(mgm.) 
Iodin number. 
Equivalent in oleic acid.(per cent) 
Totgd fatty acids (T) (1.00—0.00022594 e) .(per cent) 
Neutralization number (n) sjT .(mgm.) 
Free fatty acid (A) ajn .(per cent) 
Soluble fatty acids ( 5 ) (T*—/)..(per cent) 
Neutralization number. (mgm.) 
Insoluble fatty acids (/) by alcoholic potash.(per cent) 
Stearic acid (by crystallization)..(per cent) 
Glycerol (0.00054703 e) ..’.(per cent) 
231-453 
2.183 
229.270 
27.999 
31-145 
94.819 
244.100 
.894 
7-319 
509.619 
87.500 
221.890 
13.010 
12.542 
Table II .—Fatty acids in butter fat 
Fatty adds. 
Per cent. 
Soluble acids: 
But3Tic acid (by difference)... 
3 -153 
1.360 
• 97 S 
1.831 
Caproic acid. 
Caprylic acid.. 
Capric acid.. 
Total... 
7-319 
Insoluble acids: 
Eauric acid. 
6.89s 
22.618 
15.458 
11.384 
31.145 
Myristic acid.. 
Palmitic acid (by difference). 
Stearic acid. 
Oleic acid . 
Total. 
87.500 
Total fatty acids . 
94.819 
