The blue gum tree, Eucalyptus Globulus, is found in southern countries. From a hygienic point of view it is unusually interesting. It has an enormous capacity for absorbing water from the soil. One tree, it is said, will absorb in twenty-four hours ten times its weight of water. Swamps are therefore drained and transformed into dry land by planting the eucalyptus. It is also believed that it purifies the air of malarial districts by absorbing poisonous emanations and by giving forth balsamic principles.

It is largely cultivated in southern malarial localities; for instance, in the Roman Campagna, portions of which it has transformed into habitable regions.

The leaves only are official. They yield tannic acid, the principles turpene, cymol, eucalyptol, and others.

Physiological Actions

It is tonic to appetite and digestion, and stimulates all the juices of the alimentary tract. It is destructive to low forms of life, antimalarial, diaphoretic, and a stimulant expectorant. It is eliminated by the skin, mucous membranes, and kidneys. It is given when quinine cannot be administered, its effect being much the same. In excessive doses, symptoms similar to those caused by overdosing with quinine appear, as headache, palpitations, and numbness of the limbs.

Preparations

Oleum Eucalypti. Oil Of Eucalyptus

The essential oil, which is the active principle of the drug. Average dose,  viii.-0.5 mil, in emulsion or capsule.

Fluidextractum Eucalypti. Fluidextract Of Eucalyptus

Average dose,  xxx.-2 mils.