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that the passengers and crew should be subject to " surveil-
lance " for a period sufficient to complete a term of ten days
from the date of departure of the vessel from the infected
port.
11. The quarantine rules made by the Governments of
Madras, Bengal and Burma under the powers conferred by
section I, Act I of 1870, with previous sanction of the Gov-
ernor-General in Council to protect their ports from being
regarded by the European powers as infected, prescribe fifteen
days' quarantine for all vessels in which a case of plague
is found on arrival, or on which it is believed that a case
has occurred during the voyage, with this exception that the
rules for Calcutta apparently prescribe only eight days' qua-
rantine in the latter case. In the Bombay Presidency all the
principal ports are infected and the Government of Bombay
have issued special rules regarding inspection, segregation
and disinfection at these ports. Under the rules of the
other Maritime Governments, no communication may be
held with other boats or vessels or with the shore whilst the
vessel remains in quarantine, but the Health officer may
direct the removal of so many of the passengers and crew as
may not be suffering from illness, and whose services may
not be required on board, to places of segregation on shore
where they are required to complete the period of quarantine.
If a case of plague occurs whilst the quarantine is in pro-
gress quarantine recommences for a further period of fifteen
days.
(a) The period of fifteen days' quarantine was fixed in
view of the possibility that some of the Governments in
Europe might not regard quarantine as effective if it were
prescribed for a shorter period, but now that the Conference
has authoritatively pronounced that the period of incubation
may be taken at ten days, the period of observation should
be reduced from fifteen to ten days. The quarantine rules
in the case of vessels on which there is a case of plague at
the time of arrival, or on which it is believed that a plague
case has occurred during the voyage, should also be modified
in accordance with the regulations framed by the Conference
for infected vessels. The Government of Madras have
already revised their rules in a similar direction. The
Governor-General in Council lays special stress upon the
undesirability of detaining the sick and healthy on boardship
together. The sick should be landed and treated in an iso-
lation hospital, and the healthy should be landed and detained
under observation in suitable segregation shelter for a period