The Essential Oils of the Western Australian Eucalypts. 249 
Fraction 7 (wliicli was pale yellow in colour) and the final residue both 
.gave a purple colouration with ferric chloride. 
Distillation of 150 grams of the oil gave 123 grams (82 per cent.) of oil, 
distilling between 164° and 185°. This oil contained 80 per cent, of cineole 
and had the following physical properties at 20° ; — Specific gravity, 0*918 ; 
refractive index, 1*461; specific rotation, -!-2*76°. It was soluble in two 
volumes of 70 per cent, alcohol. The requirements of the British Pharma- 
copoeia for eucalyptus oil are : — Cineole, not less than 70 per cent. ; specific 
gravity (15*5°/15*5°), 0*910 to 0*930; refractive index (20°), 1*458 to 
1 *470 ; optical rotation, — 5° to +5° ; soluble in five volumes of 70 per cent, 
alcohol. The oil gave no reaction for phellandi'ene and, when tested for 
aldehydes by the Pharmacopoeial method, required 0*65 ml. of 0*5N alcoholic 
caustic alkali (B.P. fi.gure, not more than 2 ml.). 
The author is indebted to Mr. G. E. Brockway for the collection, and to 
Mr. C. A. Gardner for the identification of the material. 
Perth Technical College. 
