No; they have
actualized for a moment a wish, a fear, a passion, but not an idea.
_April_ 1. 1832.
EPIDEMIC DISEASE.--QUARANTINE.
There are two grand divisions under which all contagious diseases may be
classed:--1. Those which spring from organized living beings, and from the
life in them, and which enter, as it were, into the life of those in whom
they reproduce themselves--such as small-pox and measles. These become so
domesticated with the habit and system, that they are rarely received
twice. 2. Those which spring from dead organized, or unorganized matter,
and which may be comprehended under the wide term _malaria_.
You may have passed a stagnant pond a hundred times without injury: you
happen to pass it again, in low spirits and chilled, precisely at the
moment of the explosion of the gas: the malaria strikes on the cutaneous or
veno-glandular system, and drives the blood from the surface; the shivering
fit comes on, till the musculo-arterial irritability re-acts, and then the
hot fit succeeds; and, unless bark or arsenic--particularly bark, because
it is a bitter as well as a tonic--be applied to strengthen the veno-
glandular, and to moderate the musculo-arterial, system, a man may have the
ague for thirty years together.
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