in a liquid state, but soon hardens by exposure to the air. The
largest quantity of the gum comes from Barbary. Gum senegal is
produced by _A. vera_. By some it is thought that the timber of
_A. arabica_ is identical with the Shittim tree, or wood of the
Bible. From the flowers of _A. farnesiana_ a choice and delicious
perfume is obtained, the chief ingredient in many valued "balm of
a thousand flowers." The pods of _A. concinna_ are used in India
as a soap for washing; the leaves are used for culinary purposes,
and have a peculiarly agreeable acid taste. The seeds of some
species are used, when cooked, as articles of food. From the seeds
of _A. niopo_ the Guahibo Indians prepare a snuff, by roasting the
seeds and pounding them in a wooden platter. Its effects are to
produce a kind of intoxication and invigorate the spirits. The
bark of several species is extensively used for tanning, and the
timber, being tough and elastic, is valuable for the manufacture
of machinery and other purposes where great strength and
durability are requisite.

7. ACACIA DEALBATA.--The silver wattle tree of Australia. The bark is
used for tanning purposes. It is hardy South.

8. ACACIA HOMOLOPHYLLA.--This tree furnishes the scented myall wood, a
very hard and heavy wood, of an agreeable odor, resembling that of
violets. Fancy boxes for the toilet are manufactured of it.

9. ACACIA MELANOXYLON.--The wood of this tree is called mayall wood in
New South Wales. It is also called violet wood, on account of the
strong odor it has of that favorite flower; hence it is in great
repute for making small dressing cases, etc.

10. ACACIA MOLLISSIMA.--The black wattle tree of Australia, which
furnishes a good tanning principle. These trees were first called
wattles from being used by the early settlers for forming a
network or wattling of the supple twigs as a substitute for laths
in plastering houses.

11. ACROCOMIA SCLEROCARPA.--This palm grows all over South America. It
is known as the great macaw-tree. A sweetish-tasted oil, called
Mucaja oil, is extracted from the fruit and is used for making
toilet soaps.

12. ADANSONIA DIGITATA.--The baobab tree, a native of Africa. It has
been called the tree of a thousand years, and Humboldt speaks of
it as "the