_Diagnosis and Treatment._--There is no disease that can be diagnosticated with more ease and certainty; the eggs are present in the feces in great numbers, and by means of a microscope they can always be detected. In all cases where the disease is suspected, a half-teaspoonful of the feces of the person supposed to be infected should be placed in a bottle and sent to a competent microscopist for examination. This is done free of charge at the laboratories of most State Boards of Health in those parts of the country where the malady exists. Whenever an individual shows the symptoms above detailed, an intelligent physician should at once be called. We have medicines that act as specifics, and the disease can always be cured in a very short period of time. _Preventive Measures._--Of course the best method of preventing this disease is to administer to those already infected the proper medicines, and cause the expulsion from the intestines of the worms that lay the eggs. The indiscriminate scattering of the feces around the stables, so very common in many districts, should be absolutely forbidden. Around the house where individuals have lived who have the disease every care should be taken to prevent contact with the earth in the neighborhood of places where the ground might have become infected. It would be advisable for children and others to wear shoes for at least a year after the last individual having the disease was cured; and as a precautionary measure it should be insisted upon that properly constructed privies or water-closets should be at every house, and that they should be used by everyone in whom there is a possibility that the disease exists. DIPHTHERIA AND ITS TREATMENT. Loeffler's discovery in 1884 of the germ of diphtheria, and its relation to the disease of the same name, established the specific infectious nature of this malady, and demonstrated beyond a doubt that membranous croup is not ordinarily an independent affection, but is almost always simply diphtheria of the wind-pipe. The discovery of antitoxin, some time later, reduced the mortality of diphtheria from an average of 30% to 10% in ten years; its use has also shortened the course of the disease, and decreased greatly the frequency of the paralytic conditions that not uncommonly follow this malady. _Character and Course of Diphtheria._--Diphtheria is an affection caused by a bacterial microbe which produces a poison that acts locally upon the tissues invaded, and also, as a result of its introduction into the general circulation, brings about more or less profound effects on the entire system.