313 
Smith, H. G. " Note on the Sesquiterpene of Eucalyptus Oils." Proc. Roy. 
Soc. N.S.W., xxxv, 124. A determination of this frequently occurring constituent in 
these oils, which is here named Aromaclendrene. 
1902.- ' Notes on two chemical constituents from the Eucalypts." Proc. Roy. 
S-x. N.S.W., xxxvi, 61. Describes more fully the chemical characters of the oil of 
Eucalyptus Macarthuri, and completes the chemical work in connection with Myrticplorin. 
Smith, %. G., and Baker, R. T. " A Research on the Eucalypts, especially in 
regard to their Essential Oils." Royal 4to (12 x 10), xi-300 pp., 46 plates. This 
research embraces the results of six years botanical and chemical study of these trees 
in their living state, based on economic considerations. The data obtained from 1 10 
species from Eastern Australia are here published, the comprehensive results being 
based on botanically correct material. The chemistry of the Essential Oils from all 
these species is somewhat fully treated, and new oil constituents are described. 
Maiden) J. H. " Leaves of E. linearis Dehn., of Tasmania, seem to have an 
odour of oil of geranium when crushed." Rep. Aust. Ass. Adv. Science, 1902. 
McClatchie, A. J. " Eucalypts cultivated in the United States." See " Eucalypts 
as a source of oil in U.S.A.," p. 38. Bureau of Forestry Bulletin, U.S. Dept. of Agric. 
No. 35, (1902). 
1904. Hall, Cuthbert. " On Eucalyptus Oils, especially in relation to their 
bactericidal power." (Parramatta, N.S.W., 1904.) " Eucalyptus oil in the treat- 
ment of typhoid fever." (Aust. Med. Gaz., 20th September, 1904.) Abstracted in 
Chem. and Drugg, Aust., xix, 249, 1st October, 1904. 
He shows that the value of Eucalyptus oil depends on ozonisation products 
from the terpenes, of which the chief is phellandrene, and that Eucalyptol is of minor 
importance. 
If, says he, Eucalyptus oil be valued medicinally chiefly for its power as an antiseptic, then we must 
regard ozone as its most valuable constituent, and next to this the pinenes and other terpenes, as they are 
not only antiseptic in themselves, but are the agents in the production of the ozone. Piperitone also seems 
likely to prove a valuable constituent, and is well worth further trial. Eucalyptol we must regard as the 
weakest antiseptic of all, and to be chiefly valuable as a carrier of ozone. It also helps to dilute and cover 
the taste of the rather nauseous terpenes, and makes the oil more palatable and more pleasant for inhalation. 
. . . Another matter that presents itself is that the amount of ozone developed must depend on the 
amount of terpene present, and it is, therefore, necessary to ensure that a proper proportion of this is 
present in an oil. 
Earlier he establishes the ozonising property of the terpenes, phellandrene and 
aromadendrene, and that eucalyptol and piperitone only develop ozone in the very 
slightest degree, although he shows that piperitone has well-marked bactericidal 
properties. 
The drug which is likely to be most effectual in the treatment of typhoid fever must possess the 
power of reducing the temperature, of acting as an antiseptic, and of producing a tonic effect on the heart 
and system generally. These indications are fulfilled in a marked degree by Eucalyptus oil. Eucalyptol, 
when pure, has little bactericidal power. Piperitone and terpenea have a much more powerful action, while, 
if the oil is to have a particularly powerful bactericidal effect, it must have a sufficiency of ozone, derived 
