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 mosquitoes at night. It is furthermore their duty to vigorously treat the disease until the parasites are no longer present in their bodies, at which time they cease to be a menace to others. Many children have malaria without showing symptoms, and, if allowed to sleep without being properly covered with a net, are very apt to infect a large number of malarial mosquitoes; the blood of children in malarial localities should be examined from time to time, and if the parasites be found, the children should be given the proper remedies until a cure is effected. Particular attention should also be directed to the fact that almost all Negroes in malarial localities of the South harbor the parasites, though very few of them show symptoms of their attacks. It is, therefore, very important that they be treated properly, and their white neighbors should see to it, for their own safety, that they do not sleep in houses unprotected by nets.