ges were revived for a number of months. Trains going out of the
infected regions were stopped by crowds armed with guns and the
passengers prevented from proceeding, lest the disease might spread. No
goods or freight were allowed to pass out from the infected area, and
the prejudice against intercourse with the outside world went so far
that guards even forbade the carrying of disinfectants to the victims.

Like malaria, the disease is one requiring a hot climate, generally
because it is favorable to mosquito growth. It is most common in the
seacoast cities of the South, and is probably transmitted often by
mosquitoes brought on board ship. Since Havana has been cleaned up by
Americans, the danger formerly existing from intercourse with that city
has ceased, although only three years ago the writer stopped in a hotel
at Havana, where two persons had died of yellow fever a week before. The
smell of disinfectants in the hotel was so great that not a fly or
insect of any sort was visible, and no other hotel in the city could
have been safer or more comfortable. It has been proved positively that
yellow fever cannot be transmitted by direct contact, since, in the
interests of science, volunteers have slept in beds from which the dead
from yellow fever had just been removed without contracting the disease.
That the infection is due only to mosquitoes is proved by the fact that
later, when bitten by mosquitoes, they succumbed to the disease. It
requires about two weeks for the disease to pass through its regular
stages in the body of the mosquito, so that there is no possibility of
its transmission for that time after the mosquito has come in contact
with a yellow fever patient.

The symptoms of yellow fever are characteristic and very severe. The
eyes first become bloodshot and, in the course of two days, yellow,
whence the name of the disease. Severe vomiting is also characteristic,
the discharge being sometimes discolored like coffee or even tar and
known as black vomit. The skin appears yellow, a condition which lasts
for some time and is particularly noticeable if by the pressure of the
finger on the skin the blood is made to recede. Among persons previously
in good health, the death-rate is about that of typhoid fever, but among
those in unfavorable surroundings and among those given to the use of
alcohol, the rate will be much higher. Practically, it may be expected
that this disease, like malaria, will disappear from