But of dying there was no danger, as the poison of the upas does not kill, when only inhaled as a vapour; unless the inhalation be a long time continued.

Its sap taken internally, by the chewing of its leaves, bark, or root, is certain death, and speedy death.

It is one of the ingredients used by the Bornean Dyaks for tipping their poisoned spears, and the arrows of their _sumpitans_ or blow-guns.

They use it in combination with the _bina_, another deadly poison, extracted from the juice of a parasitical plant found everywhere through the forests of Borneo.
It is singular that the upas-tree should belong to the same natural order, the Artocarpaceae, as the bread-fruit; the tree of death thus being connected with the tree of life.

In some of the Indian islands it is called _Popon-upas_; in Java it is known as the _Antijar_.
Its leaves are shaped like spear-heads; the fruit is a kind of drupe, clothed in fleshy scales.
The juice, when prepared as a poison, is sometimes mixed with black pepper, and the juice of galanga-root, and of ginger.