ESSENTIAL OIL OF BACKHOUSIA MYRTIFOLIA. 129 
acid as titration with semi-normal alkali solution showed it 
to havea molecular weight of 226. (C,,HisOs5 requires 226. 
Sesquiterpene.—A portion of the oil boiling at 120-138°C. 
at 10 mm. gave the well known colour reactions for sesqui- 
terpenes usually present in the essential oils of the 
Myrtacee. It was not possible to purify the quantity 
available. 
Determination of Paraffin.—From the residue boiling 
above 148° CO. at 10 mm. a saturated paraffin was obtained 
of melting point 62-—63° C. 
Phenols.—Unidentified phenolic bodies were present to 
the extent of 0°24% to 0°5% in the various oils. 
In conclusion I have to express my thanks to Mr. F. R. 
Morrison, Assistant Chemist, for his usual kindly assist- 
ance in this investigation. © 
I—September 6, 1922. 
