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don was 14 weeks, 9 weeks, and 5 weeks
respectively; and the duration of the disease
was equally variable—the last epidemic
remaining with us but six months, while in
former visitations it was here for more than
a year. The influence of sanitary measures
may have had something to do with these
results, for their beneficial action has everywhere
been abundantly proved.
9. That as regards the individual attacked
by the disease, it has been generally observed
that he has suffered from diarrhoea for one,
two, or three days before the setting in of
serious symptoms; and this is ordinarily
amenable to treatment.
10. That the period of incubation of the
disease—that is the time which elapses between
exposure to infection and the coming
on of well marked symptoms is variable,
although it probably ranges from three to
eight days.
11. That the duration of an acute attack
when the symptoms are fully developed is
rarely over a day, while that of common English
Cholera is not less than three days, and
of ordinary diarrhoea six days.