In view of the gravity of the disease, it is certainly important that proper measures should be taken to protect the system against injuries from it so far as possible. The best means of accomplishing this is removal of the sources of the infection so far as possible. Marshes and low lands should be drained. This may be done either by ditches, or by the planting of rapidly growing trees. Among the most useful for this purpose is the Eucalyptus globulus. The common sun-flower has also been highly recommended by those who have employed it successfully for the same purpose. These trees and plants operate, not by destroying the poison, but by draining the damp soil from which it is generated and thus preventing its formation. Individuals who are obliged to live in malarious districts, as are a large share of the inhabitants of this country, should adopt every precaution possible to avoid all unnecessary exposure to the poison, and especially to avoid all known exciting causes. The old idea that whisky is a preventive of malarial poisoning has been long since exploded.

There is no doubt but that the malarial germs may be conveyed a considerable distance by winds. They are also conveyed by fogs. On account of the condition of the atmosphere during the night, it is probable that they are more abundant in the air at this time than during the light part of the day. There is also good reason to believe that the germs are most abundant in the lowest strata of the air. On this account, persons who live in the upper stories of buildings are less likely to suffer than those who occupy lower stories or basements.

There is reason for believing that the susceptibility to malarial poisoning is considerably affected by diet. A simple, wholesome, nutritious diet fortifies the system against diseases of all kinds by increasing its general vigor. A diet of such a character as to induce an inactive state of the liver and a weak condition of the digestive organs, will be likely to encourage the contraction of malarial diseases. A few years ago, we met a gentleman who resides in a very malarious district in the State of Indiana, who has given much attention to the matter of dietetics. He informed us that although every other family in the town had suffered from malarial disease, himself and his entire family had escaped. They were of course exposed to the malarial germs as well as their neighbors, but by their careful dietary, their systems were fortified so as to be able to eliminate the poison without severe injury.