The art of sewage treatment is a recent one, and its development is as yet comparatively rudimentary. It seems reasonable to believe that, as time passes, the field of waste sanitation will become more and more comprehensive, and that many conditions now tolerated will eventually be regarded as obviously intolerable. One phase of waste sanitation which seems to be arousing attention is the treatment of sewage from such public conveyances as fresh water steamers and railway coaches. Some significant features of this problem were recently considered by L. C. Frank of the United States Public Health Service, in a paper on "The Control of Traffic Sewage."
The problem of traffic sewage control is at present being investigated by the Public Health Service and by the International Joint Commission. Naturally the public interests require the prompt and effective removal of any dangers arising from traffic sewage. Naturally, also, the traffic interests