, coated
tongue, and nausea, which sometimes amounts to vomiting. After a term of
general irritability, heat, and restlessness, about the fourth day, or
between the third and fourth, an eruption makes its appearance over the
face, neck, and body, in its first two stages closely resembling
small-pox, with this especial difference, that whereas the pustules in
small-pox have _flat_ and _depressed_ centres--an infallible
characteristic of small-pox--the pustules in chicken-pox remain
_globular_, while the fluid in them changes from a transparent white to
a straw-coloured liquid, which begins to exude and disappear about the
eighth or ninth day, and, in mild cases, by the twelfth desquamates, or
peels off entirely.

2540. There can be no doubt that chicken-pox, like small-pox, is
contagious, and under certain states of the atmosphere becomes endemic.
Parents should, therefore, avoid exposing young children to the danger
of infection by taking them where it is known to exist, as chicken-pox,
in weakly constitutions, or in very young children, may superinduce
small-pox, the one disease either running concurrently with the other,
or discovering itself as the other declines. This, of course, is a
condition that renders the case very hazardous, as the child has to
struggle against two diseases at once, or before it has recruited
strength from the attack of the first.

2541. _Treatment_.--In all ordinary cases of chicken-pox--and it is very
seldom it assumes any complexity--the whole treatment resolves itself
into the use of the warm bath, and a course of gentle aperients. The
bath should be used when the oppression of the lungs renders the
breathing difficult, or the heat and dryness of the skin, with the
undeveloped rash beneath the surface, shows the necessity for its use.

2542. As the pustules in chicken-pox very rarely run to the state of
suppuration, as in the other disease, there is no fear of _pitting_ or
disfigurement, except in very severe forms, which, however, happen so
seldom as not to merit apprehension. When the eruption subsides,
however, the face may be washed with elder-flower water, and the routine
followed which is prescribed in the convalescent state of small-pox.

2543. COW-POX, properly speaking, is an artificial disease, established
in a healthy body as a prophylactic, or preventive agent, against the
more serious attack of small-pox, and is merely that chain of slight
febrile symptoms and local irrit