FIG. 103.-A good method of building a porch on the back of a cottage for country use. Loaned by the Journal of the Outdoor Life.-Carrington.

Carrington.

and such articles as milk, eggs, fish, and fowl, together with an abundance of fat, should be eaten. A mixture of raw eggs and milk stirred together is recommended. Eight or twelve eggs and the same number of glasses of milk may often be taken daily in this way.

MALARIAL FEVER.

Malarial fever is caused by minute organisms, which, upon being introduced into the blood stream, attack and destroy large numbers of red corpuscles. After entering a corpuscle the organism increases in size until it occupies nearly the whole of the disk, when it separates into a number of segments, each of which when set free may attack another corpuscle, and the process is repeated. The period of time which elapses from the entrance of the germ into the corpuscle to the breaking down of the same and the extrusion of the young parasites varies from 24 to 72 hours, depending upon the variety of the parasite which is present. The chill of malarial fever corresponds to the disintegration of the corpuscles and the release of the new forms. A poison is also liberated at this time, and the action of this poison upon the system accounts to a great extent for the chill.

After malarial organisms have existed in the blood for a considerable time, ovoid and crescent shapes begin to appear. These forms are quiescent and are not known to undergo fur

From Italy

FIG. 112.-Germs of malaria were sent from Italy to England in a mosquito, and a physician who was bitten by the mosquito developed malaria. (Ritchie's "Primer of Sanitation.")

ther development in the human body. When, however, during the process of biting, they are drawn up into a mosquito's stomach through its bill, other changes take place, which finally result in a number of other organisms (sporozoites) finding themselves in the salivary glands of the mosquito. If this mosquito now bites a person, a portion of the secretion of this gland containing these.organisms is injected into the wound caused by its bite, and the person thus becomes inoculated with the malarial organism and contracts the disease. This will not occur, however, until a sufficient time has elapsed to allow the new forms to develop and find their way into the saliva of the mosquito. This usually takes from 10 to 14 days from the time the mosquito bites the person infected with malaria.

Malaria is carried only by certain kinds of anopheles mosquitoes. The female alone is capable of transmitting disease; it is doubtful if the male bites at all. Anopheles mosquitoes are distinguished by their palpi, which are nearly as long as their bill, The wings are