Colebrook; _D. aromatica_, Graertner. It is
secreted in crystalline masses naturally into cavities of the wood. It
supplies this camphor only after attaining a considerable age. In its
young state it yields, however, by incision, a pale yellow liquid,
called the liquid camphor of Borneo and Sumatra, which consists of
resin and a volatile oil having a camphorated odor.

An account of this tree, and of the mode of procuring the peculiar and
high-priced camphor which it yields, is given by Dr. Junghuhn, who has
travelled lately in Sumatra, and Prof. De Vriese, of Leyden, in the
"Nederlandsch Kruidkundig Archief" for 1851. An abstract of the
memoir, translated into English by Miss De Vriese, is published in
"Hooker's Journal of Botany " for February and March 1852:--

The Dryobalanops is a gigantic tree, rising for fifty or even a
hundred feet above those which compose the chief mass of the forests
where they grow, just as the steeples of the churches appear above
the roofs of the houses in a town. The trunks of the full-grown
trees are from 7 to 10 feet in diameter at the very base, and from 5
to 8 feet higher up; they rise to the height of 100 or 130 feet, and
their ample crown is from 50 to 70 feet in diameter. The tree has a
limited range, being confined to the seaward slope of the mountains
of southwestern Sumatra, most abundant on the lower slopes and the
outlying hills of the alluvial plain, and extending in latitude from
1deg. 10m. to 2deg. 20m. N., and perhaps further to the north.
Camphor oil occurs in all the trees, and is most abundant in the
younger branches and leaves. The solid camphor is found only on the
trunks of older trees, especially in fissures of the wood, and in
smaller quantity than is generally supposed. Colebrooke, and authors
who have copied from him, assert that camphor is found in the heart
of the tree in such a quantity as to fill a cavity of the thickness
of a man's arm, and that a single tree yields about eleven pounds.
The price of this camphor, which at Padang sells for about 340
dollars per hundred weight, suffices to show that the account is
much exaggerated. The camphor occurs only in small fissures, from
which the natives, having felled the trees and split up the wood,
scrape it off with small splinters or with their nails. From the
oldest and richest trees they rarely collect more than two