THE ESSENTIAL OILS OF TWO LEPTOSPERMUMS. 169 
and refractive index at 20° C. of 1°5100 contained consider- 
able sesquiterpene alcohol. 
The principal constituents of this oil, so far determined, 
are:—a and 8 pinene; cineol, about 8/10%; « terpineol; 
sesquiterpene and sesquiterpene alcohol. 
This is the first recorded occurrence of terpineol in the 
essential oils of the Leptospermum. Although its presence 
had previously been suspected, the writer was unable to 
identify it. 
My thanks are due to the Forestry Commission of New 
South Wales and Mr. Gordon Burrow, District Forester at 
Narrabri, for kindly furnishing the excellent supply of 
material for distillation; to the latter gentleman ‘also for 
many kindnesses shown the writer when on an official visit 
to Narrabri in September, 1921. 
Whilst the essential oils described herein are practically 
of no economic value, the results of the investigation are 
certainly of scientific interest. They have afforded con- 
firmation of the botanical differentiation in showing the 
differences between L. flavescens, Smith, and its variety 
_microphyllum on the one hand, and the latter with its 
closely related form, L. flavescens, Sm. var. leptophyllum, 
heel, on the other. 
