BA Ses of Bebbal 80°. ‘The ee este fraction boiling between 170 an 190° (53 per cent., 
- diso 0.874, @y — 8.562, Nipwo 1.4865) yielded no solid compound with phosphoric Acid: 
It contained 10.4 per cent. of eucalyptole, as treatment with a 50 per cent. resorcinol 
_ solution showed. The oil contained 8.4 per cent. of aldehydes but no phellandrene. 
Leaves and short twigs of E. crebra, likewise, from Kaunli, contained 33.0 per cent. 
oot moisture and 0.31 per cent. of essential oil (0.46 per cent. calculated on dry material). 
F 55. 24, soluble with turbidity in 15 vols. of alcohol 80 per cent.) obviously did not con- 
tain any eucalyptole, for there was no crystalline deposit with a 50 per cent. fora 
- solution. The oil was free from phellandrene, aldehydes and ketones. 
The oil distilled over between 170 and 240°, leaving 41 per cent. of residue. The 
"rectified product. (digo 0.899, g 0 8, 24°, Npiso 1,46073, acid’v. 6.8, ester v. after acetylation — 
Both oils do not answer the requirements of the British Pharmacopeeia, are unfit 
4 “for medicinal use and can only come into CONS LaT A HOr oe for perfuming purposes, 
_ owing to their agreeable smell. 
details: tally fairly well with Baker and Smith’s remarks, according to whom, however, 
the oil of EL. crebra, F. v. M., contains much phellandrene and cineole’) i.e. just the 
y reverse of what is said in Ghose’ s article. | ae 
s cceaian a: an English Aetnuioel 2) the eponmientl eae plantations in 
the Khasi and Jaintia Hills, Assam, were not successful owing to the attacks of white 
_ at the elevation of Shillong. 
e The index of refraction in testing eucalyptus Ouls.-— Generally Sean the index of 
refraction is of little importance in examining essential oils. _H. G. Smith’) thinks, 
. _ however, that it is otherwise with regard to certain eucalyptus oils. His article contains 
_ many other noteworthy remarks on Australia’s eucalyptus oil industry. He mentions 
that: the methods of distillation have been greatly improved in the last years and that 
far more attention than formerly is paid to the homogeneous nature of the material 
' and moré customary to sell the oils of definite eucalypts under their botanical name, 
such as oil of Eucalyptus polybractea, E. Smith, E. dives, EH. Macarthuri, &c. In this 
_ advantages of this method have been generally recognized and it works accordingly, 
it will be no longer necessary to mix the oils of several species in order to arrive at 
_ a definite class of product. This would be a benefit for the whole industry. 
$mith thinks that the refractometre is important not only for the examination of the 
oils, but that the determination of the refraction makes it possible to discover in the oils 
- constituants hitherto unknown. Butyl butyrate for example was found in this way in the 
. oil of Eucalyptus Perriniana*), owing to the very low refractive index (1.4538 at 10°) of 
e lowest boiling fraction. Meanwhile, this ester has been found in many allied species. 
bs ractea, E. australiana and E. dives. 
a *. “* - 
* 3 olny! Gildemeister and Hoffmann, Die aitherischen ve Ze et vol. Ill, pages 217 and 294, — *) Perfum. 
_ Record 9 (1918), 207. — *) Journ. Soc. chem. Industry 37 (1918), 272 7. — *) Proceed. Royal Soc. of N.S. W., 
‘De Eemwes 1914; comp. Report October 1913, 57. 
. oa = hy. $. ; i 
es i ae ; \ 
ants (termites). The localities were apparently too low and unsuitable, at any rate, for” 
_ Eucalyptus globulus. \n consequence, it has been ee to repeat the experiments. 
distilled. In consequence, the oils show fairly constant properties. It becomes more 
4 _ The species, whose leaves are distilled most in Australia now ae Hucalyptus poly- 
We would add that as far as Eucalyptus eens is concerned, the foregoing 
_ way, it is possible to arrive at the desired uniformity of the products. As’ soon as the 
