Last week we called attention to the practical value of blood examination, and its great importance as a means of diagnosis and to the simplicity of its technic.
But valuable as is this method and simple as is the technic, it yet requires not alone a training in bacteriology, but apparatus, media, etc., that must constantly be on hand and ready at all times to be brought into use. In larger cities with their medical colleges, hospitals and municipal laboratories there is comparatively little difficulty in finding the man and the appliances close at hand. But what about the "country doctor" and physicians in small towns? How can they, however much they may desire it, make their early diagnosis of typhoid or of pneumococcus bacteriemia by the blood examination? It is well-nigh impossible for the average physician in the smaller town, or in the city for that matter, even though