332 



GERMICIDAL ACTIVITY OF EUCALYPTUS OILS, 11., 



tion number varies from 2 - 4 to 3 - as against 14-4 to 24 in the 

 case of E. cinerea. 



The Oil of E. poli/bractea. — E. poly brae tea, or "Blue Mallee," 

 is one of the chief sources of the medicinal oil at the present 

 time. The crude oil contains over 70% of cineol, besides 

 pinene and aromadendral. The rectified and crude oils were 

 tested, while a residual oil was included in order to see in how 

 far the presence of aromadendral would influence the germicidal 

 activity. 



Table xiii. B. coli communis. 



* This test was made after the paper was written with the idea of test- 

 ing the validity of the earlier tests. 



This is an instance where the crude oil is more germicidal 

 than the rectified. The residual oil. the dilutions of which had 



