ater is, in part,
composed. It is used to inflate balloons.

_Hypochondriasis_, melancholy, dejection, a disorder of the imagination,
in which the person supposes he is afflicted with various diseases.

_Hysteria_, or _hysterics_, a spasmodic, convulsive affection of the
nerves, to which women are subject. It is somewhat similar to
hypochondriasis in men.

_Ingrain_, a kind of carpeting, in which the threads are dyed in the
grain, or raw material, before manufacture.

_Ipecac_, (an abbreviation of _ipecacuanha_,) an Indian medicinal plant,
acting as an emetic.

_Isinglass_, a fine kind of gelatin, or glue, prepared from the
swimming-bladders of fishes, used as a cement, and also as an ingredient
in food and medicine. The name is sometimes applied to a transparent
mineral substance called mica.

_Kamtschadales_, inhabitants of _Kamtschatka_, a large peninsula
situated on the northeastern coast of Asia, having the North Pacific
Ocean on the east. It is remarkable for its extreme cold, which is
heightened by a range of very lofty mountains, extending the whole
length of the peninsula, several of which are volcanic. It is very
deficient in vegetable productions, but produces a great variety of
animals, from which the richest and most valuable furs are procured. The
inhabitants are in general below the common height, but have broad
shoulders and large heads. It is under the dominion of Russia.

_Kink_, a knotty twist in a thread or rope.

_Lapland_, a country at the extreme north part of Europe, where it is
very cold. It contains lofty mountains, some of which are covered with
perpetual snow and ice.

_Latin_, the language of the Latins, or inhabitants of Latium, the
principal country of ancient Italy. After the building of Rome, that
city became the capital of the whole country.

_Leguminous_, pod-bearing.

_Lent_, a fast of the Christian Church, (lasting forty days, from Ash
Wednesday to Easter,) in commemoration of our Saviour's miraculous fast
of forty days and forty nights, in the wilderness. The word Lent means
spring; this fast always occurring at that season of the year.

_Levite_, one of the tribe of Levi, the son of Jacob, which tribe was
set apart from the others, to minister in the services of the
Tabernacle, and the Temple at Jerusalem. The Priests were taken from
this tribe. See Numbers i. 47-53.

_Ley_, water which has percolated through ashes, earth, or other
substances, dissolving and imbibi