345 
Later on quantities of oils belonging to Class 2 came on the market, and " probably to meet the competition 
of these new Australian oils, dealers and distillers of the Algerian oils turned the attention of medical 
authorities to the greater abundance of the crystallisable body (Eucalyptol), to be found in the E. globulus 
class of oils compared with the Australian oils then in use, many of which contained none at all, and 
evidently succeeded in impressing them with the view that this body contained the valuable medicinal 
principle of the oil, with the result that in the next revision of the Pharmacopoeia (1898) oils of the Eucalyptol- 
Phellandrene class, as well as oils of the purely Phellandrene class, were excluded in favour of the purely 
Eucalyptol oils." 
He then draws attention to the results of Dr. Hall's researches, which have 
already been referred to. 
Mr. Brownscombe suggests to the General Medical Council that, provided 
phellandrene-piperitone oils contain a reasonable proportion of Eucalyptol, they should 
be admitted for medical use and official recognition in the next edition of the 
Pharmacopoeia. 
Brownscombe, W. S. ' Eucalyptus Oil; its composition and analysis." Paper 
read before the Society of Chemical Industry of Victoria. Chem. and Drugg. of Aust., 
1st August, 1910, p. 240. This is a valuable paper, with the following headings : 
The oils on the market, adulteration very rare, the Victorian standard, specific gravity 
and its variations, refractive index, fractional distillation, estimating Eucalyptol, 
aldehydes and terpenes, Phellandrene, the theoretical standard for Eucalyptus oil. 
The original should be referred to. 
Martindale, Dr. W. H. " Essential oils as Antiseptics." Perfumery and Essential 
Oil Record, November, 1910. Abstract in Chem. and Drugg., Ixxvii, 3rd December, 1910, 
p. 50. The oils were used in aqueous or saponaceous solutions, and the experiments 
were made with Bacillus coli communis. 
" The Lancet " bacteriological method was employed to determine the carbolic acid coefficient 
of each oil or aromatic substance, the details being fully set forth in the paper. The results show that 
some essential oils are much more antiseptic than has hitherto been credited by bacteriologists, the following 
being the coefficients in the Eucalyptus oils quoted : 
E. amygdalina 4-35 
Eucalyptol 3-76 
E. globulus 3-55 
In a supplementary note, Dr. Martindale, in commenting on these coefficients, recalls the discussion 
between Umney and Brownscombe (Chem. and Drugg., vol. 76, 1910, pp. 271 and 669) as to which type 
of oil should have preference in the forthcoming New British Pharmacopoeia, and says : 
" As the action of Eucalyptus oils is generally considered due to antiseptic power, it would seem 
desirable not to exclude oils rich in phellandrene. Personally I would stipulate that the oil must not be 
of such a character as to produce a choking sensation on inhalation. The spasmodic effect is stated to 
be produced by aromadendral and other aldehydes; other authorities say the phellandrene is the choking 
body. Of this much we are certain, that of the three samples under discussion the amygdalina produces 
by far the most choking, and the globulus has by far the pleasantest smell." 
Dr. Martindale assigns bactericidal coefficients as follows : 
E. amygdalina ... ... ... ... ... 4'35 
Eucalyptol 3-76 
E. globulus 3-55 
results which support Hall's view that the antiseptic power of Eucalyptol is less than that of the other 
main constituents of Eucalyptus oil, and is exceeded by that of phellandrene and piperitone. He adds 
