fever.

The miasm in the latter case is therefore endoecic, or more exactly
entoichic. With us the propagation of intermittent fever has been
observed in persons occupying rooms scoured with unfiltered water
containing the Limnophysalis hyalina in great quantity.

The following imperial ordinance was published on the 25th of March,
1877, by the chief of admiralty of the German marine. It has for its
object the prevention and eradication of infectious diseases:

"In those places where infectious diseases, according to experience, are
prevalent and unusually severe and frequent, it is necessary to abstain
as much as possible from the employment of water taken from without the
ship for cleansing said vessel, and also for washing out the hold when
the water of the sea or of a river, in the judgment of the commander of
a vessel, confirmed by the statement of the physician, is shown to be
surcharged with organic matter liable to putrefaction. With this end in
view, if you are unable to send elsewhere for suitable water, you must
make use of good and fresh water, but with the greatest economy. In that
event the purification of the hold must be accomplished by mechanical
means or by disinfectants."

"As I have demonstrated by my investigations that in the distillation
of paludal water, and that from the marshy shores of the sea, the
Limnophysalis hyalina, which is impalpable, is carried away and may be
detected again after the distillation, it must be insisted that the
water intended to be used for drinking on shipboard shall be carefully
filtered before and after its distillation."