May 25, 1914 
Aroma of Hops 
133 
PHYSICAL PROPERTIES OF THE FRACTIONS 
SPECIFIC GRAVITY 
Although the specific gravity, as a rule, is apt to show only slight dif¬ 
ferences, owing to the variable composition of the oil, it was thought that 
determinations of this property might be of some value. The specific 
gravity of the various fractions from the oils of the crops of 1906, 1907, 
1908, and 1909 is given in Table V. 
Table V .—Specific gravity of fractions of hop oils for the years igo 6 to igog, inclusive, 
1906 CROP (AT 25° C.). 
Source of hops. 
Fraction 
x, 165° to 
185* C. 
Fraction 
2, 1S5 0 to 
205 6 C. 
Fraction 
3, 205° to 
22s ^C. : 
Fraction 
4, 225 ° to 
24 S*C. 
Fraction 
5, 245° to 
260° C. 
Fraction 
6, 260° to 
275 ° C. 
Fr action 
1 * a 75 °C. 
Oregon. 
0. 818 
0. 821 
O. 849 
0. 876 
0.877 
O. 88 l 
Do. a . 
. 820 
"839 
• 859 
.882 
• 894 
. 9OO 
0. 887 
New York. 
.813 
. 829 
•853 
.862 
. 89O 
.894 
Imported .j 
•8 is 
. 819 
•825 
• 83s 
.888 
.888 
Do. 0 .| 
! 
.826 
.838 
.850 
.873 
. 891 
.896 
.836 
« In cold storage one year before distillation. 
