May as, 1914 
Aroma of Hops 
! 3 i 
oil distilling below 185° C. was only 11.7 per cent of the oil. These 
results again show the deficiency of the imported oil in the low-boiling 
constituents. When fractions 4 (185° to 225 0 C.) and 5 (225 0 to 260° C.) 
are considered the reverse conditions exist, these fractions of the imported 
oils representing about 50 per cent of the oil, 41 per cent of the New York 
oil, 27 per cent of the Oregon oil, and an average of 13 per cent of the 
California oils. The curves of the remaining fractions are very similar. 
The figure shows that the imported oil follows almost a directly reverse 
course from that of the California and Oregon oils. In this respect the 
New York oil seems to be the most closely related to the foreign oil. 
Comparing the various oils of the'1908 crop, as given in Table IV and 
the curves in figure 4, it will be seen that nearly all show a similar trend 
in their fractionation properties. The California oils, on an average, 
again surpass the other oils in constituents which boil below 185° C., the 
lowest in this respect being those from Washington and Oregon. In that 
year, for the the first time in the three seasons, the fractionation curve of 
the imported oil followed lines somewhat similar to those of the American 
oils. No explanation is ventured for this change in the imported oil. 
The difference between the imported oil and the other oils of the 1909 
crops is also very noticeable in Table IV and figure 5. The California oils 
of the 1909 crop, as in 1906, 1907, and 1908, distilled over largely in the 
