t invariably contracted at night. The
malarial mosquito bites and then goes back to some dark corner
where it remains quiescent for forty-eight hours, at the end of
which time it again descends to feed. Contrary to the general
opinion mosquitoes bite many times, and frequently remain alive for
months--the malarial mosquito particularly living in cellars and
attics oftentimes throughout the entire winter.

If one of these mosquitoes bite a person with malaria, the
parasites are sucked in along with the blood and pass into the
stomach of the gnat, making their way ultimately into the body
substance; here the parasites undergo a series of multiplications,
a single one of them sometimes producing as many as ten thousand
young malarial parasites. After the parasites have developed fully,
which requires eight days in warm weather, they make their way to
the venom-gland of the mosquito and there remain until it bites,
when they are injected into the body of the individual attacked
along with the poison.

After getting into the human blood, each parasite attacks a
red-blood cell, bores into it, and grows at the expense of the cell
until it reaches maturity, at which time it divides up into from
seven to twenty-five young parasites which are liberated and each
in turn attacks a new cell. This process goes on until a
sufficient number of parasites are produced in the individual to
cause the symptoms of malaria, and the new subject of the disease
thereafter becomes a source of danger to others in the vicinity
through the intervention of still other malarial mosquitoes.

_Malaria Avoidable._--From the foregoing it is seen that the proper way
to avoid malaria is so to screen houses that mosquitoes cannot enter
them. Persons in malarial districts should not sit on open porches at
night, and should be careful to sleep under properly constructed nets. If
this be done, there is absolutely no danger of anyone ever contracting
the disease. It will be well observed that these precautions are not
necessary in the daytime, as the malarial mosquito rarely attempts to
bite during this period.

It should be remembered by those who have the disease that they are a
constant source of danger to people living in the vicinity, and they
should be doubly careful as long as the disease persists to avoid being
bitten by mosqui