resin that exudes from the tree is used in varnish
under the name of gum-sandarach. In powder it forms a principal
ingredient of the article known as pounce.

82. CALOPHYLLUM CALABA.--This is called calaba tree in the West Indies,
and an oil, fit for burning, is expressed from the seeds. In the
West Indies these seeds are called Santa Maria nuts.

83. CALOTROPIS GIGANTEA.--The inner bark of this plant yields a
valuable fiber, capable of bearing a greater strain than hemp. All
parts of it abound in a very acrid milky juice, which hardens into
a substance resembling gutta-percha; but in its fresh state it is
a valuable remedy in cutaneous diseases. The bark of the root also
possesses similar medical qualities; and its tincture yields
_mudarine_, a substance that has the property of gelatinizing when
heated, and returning to the fluid state when cool. Paper has been
made from the silky down of the seeds.

84. CAMELLIA JAPONICA.--A well-known green-house plant, cultivated for
its large double flowers. The seeds furnish an oil of an agreeable
odor, which is used for many domestic purposes.

85. CAMPHORA OFFICINARUM.--This tree belongs to the _Lauraceae_. Camphor
is prepared from the wood by boiling chopped branches in water,
when, after some time, the camphor becomes deposited and is
purified by sublimation. It is mainly produced in the island of
Formosa. The wood of the tree is highly prized for manufacturing
entomological cabinets. As the plant grows well over a large area
in the more Southern States, it is expected that the preparation
of its products will become a profitable industry.

86. CANELLA ALBA.--This is a native of the West Indies, and furnishes a
pale olive-colored bark with an aromatic odor, and is used as a
tonic. It is used by the natives as a spice. It furnishes the true
canella bark of commerce, also known as white-wood bark.

87. CAPPARIS SPINOSA.--The caper plant, a native of the South of Europe
and of the Mediterranean regions. The commercial product consists
of the flower-buds, and sometimes the unripe fruits, pickled in
vinegar. The wood and bark possess acrid qualities which will act
as a blister when applied to the skin.

88. CARAPA GUIANENSIS.--A meliaceous plant, native of tropical America,
where it grows to a he