May 2s, 1914 
Aroma of Hops 
121 
Table II .—Physical properties of various hop oils distilled during several successive 
seaso ns —Continued. 
SPECIFIC GRAVITY AND INDEX OF REFRACTION. 
Source of hops. 
Specific gravity. 
20* C. 
Index of refraction at 20° C. 
1907 crop. 
1908 crop. 
1909 crop. 
1907 crop. 
1908 crop. 
1909 crop. 
California: 
Perkins No. 1. 
O. 821 
O. 838 
0. 8316 
1.4838 
i- 4783 
1.4716 
Cosumne. 
. 821 
839s 
. 842 
1. 4825 
1. 4724 
4733 
Perkins No. 2. 
a. 8289 
. 8422 
I. 4691 
i- 4743 
Ukiah. 
.821 
a . 831 
0.839 
I. 4890 
i- 4737 
1.4718 
Wheatland. 
.828 
.8443 
• 8358 
1. 4870 
*• 47 S 3 
1. 4743 
Oregon. 
• 8343 
Oo 
04 
00 
• 8433 
1. 4802 
I* 4730 
1. 4705 
New York. 
6.859 
6 - 8 3 4 
6. 8747 
I. 4804 
i- 4756 
1.4800 
Washington. 
O 
VO 
00 
. 8464 
i- 4763 . 
i- 4734 
Imported (Saaz). 
6. 852 
&. 821 
6. 858 
i- 49°5 
I. 4852 
x. 4829 
* Specific gravity at 23 0 C. & Specific gravity at 24* C. 
solubility.* 
[Quantity of oil dissolved in 3 volumes of 94 per cent alcohol.] 
Source of hops. 
1907 crop. 
1908 crop. 
1909 crop. 
California: 
Perkins No. 1.. 
0.55 volume oil, 
0.7 volume oil, 
0.8 volume oil. 
turbid, yellowish 
turbid. 
/ 
Cosumne. 
residue. 
0.5 volume oil, 
0.85 volume oil, 
Do. 
Perkins No. 2.. 
whitish residue. 
brownish residue. 
0.7 volume oil, 
turbid. 
0.85 volume oil, 
0.75 volume oil, 
slightly turbid. 
0.95 volume oil, 
Ukiah. 
0.35 volume oil, 
slight turbidity, 
turbid. 
slightly turbid, 
Wheatland.... 
yellowish - brown 
residue. 
0.35 volume oil, 
0.75 volume oil, 
with reddish resi¬ 
due. 
0.7 volume oil. 
Oregon. 
New York. 
turbid, yellowish 
residue. 
0,65 volume oil, 
turbid, yellow 
residue. 
0.85 volume oil, 
brown residue. 
0.75 volume oil, 
brown residue. 
0.9 volume oil. 
0.85 volume oil. 
1 volume oil. 
0.8 volume oil, 
light brown. 
0.9 volume oil. 
0.75 volume oil, 
Washington. 
Imported (Saaz).. . 
0.85 volume oil, 
turbid. 
0.5 volume oil, 
slightly turbid. 
yellow viscous 
slightly turbid, 
residue. 
bark-brown, vis¬ 
cous residue. 
* Solubility of 1907 crop determined after two years; 1908 crop determined after one year. 
