ysician. In the more chronic forms of the
disease, combinations of arsenic, with such tonics as nux vomica, iron,
and small doses of some of the preparations of mercury, produce permanent
cures where quinine has failed. It is of the utmost importance that
attention be given to the treatment, as, so long as the patient remains
with the parasites in his blood, so long is he a menace to his friends
and neighbors.

_Mode of Infection Through Mosquitoes._--The most brilliant triumph in
modern medicine, and one of the most creditable achievements of human
ingenuity, has been the absolute demonstration that malaria is carried
from man to man by means of the Anopheles mosquito, and that the disease
can, in nature, be produced in absolutely no other way. This is not a
theory, but it is a fact which has been demonstrated in its every detail
beyond dispute, and we are now happily in a condition to reject our
venerable notions concerning bad air, miasma, etc.

Before describing the method by which infection takes place, it is
well to say a few words concerning the mosquito that acts as a
carrier of the disease, which may be easily differentiated from
other similar gnats. The malarial mosquito has a body which is
placed parallel to and almost on the same plane with the front
portions of the insect, and as a consequence, when at rest on walls
or other objects, the back of the body sticks out almost or quite
at right angles with the surface upon which it is resting. The back
portion of the common mosquito forms an angle with the front part
of its body, with the effect that both ends of the insect point
toward the object upon which it rests. There are still other
differences that clearly differentiate the malarial from the common
mosquito, but the one given ordinarily serves to distinguish
between them. The malarial mosquito is pre-eminently a house-gnat,
being scarcely ever seen in the woods or open, but may be
found--oftentimes in great numbers--in all malarial localities,
lying quietly during the day in dark corners of rooms or stables.
This mosquito practically never bites in the day, but will do so
in a darkened room, if a person will remain perfectly quiet; their
favorite time for feeding is in the early parts of the night and
about daybreak--all of which accounts for the fact, long observed,
that malarial fever is almos