May 2s. 1914 
Aroma of Hops 
127 
stituents is accomplished. A better separation, however, can be made 
by means of a 3-bulb Tadenburg distilling flask, which is a flask with 
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Fig. i.—R elative ester content of various hop oils. 
three bulbs blown in the neck below the side tube and the flask proper. 
These bulbs act like a distilling column, causing a more complete sepa- 
