Mr. Tawney. What effect has chlorination upon the potability of the water?
Dr. Clark. There is a difference of opinion with regard to that. A great many people in Buffalo complained of the chlorine tasting in the water before the chlorine was ever put into it. After it was put in they did not complain. Dr. Fronczak received dozens of letters asking that they stop using chlorine when there was no chlorine whatever being used. The amount of chlorine that is necessary to destroy pathogenic life can not be tasted.
Speaking of this surface-water drainage I think that is a question that applies more largely and more directly to smaller communities. It is well known that in some of the rural communities there have occurred some of the greatest typhoid-fever epidemics that we have ever had. In Plymouth, Pa., there occurred one of the greatest typhoid-fever epidemics that the world has ever seen. A little trout stream was contaminated by a patient that came in there. The discharges were simply not disinfected by the physician or the nurse, but were thrown out upon the ground, and when the spring rains came a serious epidemic occurred. An epidemic through surface contamination occurred at Ithaca. I think it applies more to rural communities. The State Department of Health of New York has recommended the chlorination process, and I think it has been proven beyond any peradventure that if the apparatus is carefully watched and the proper amount of gas is liberated into the water it is almost a sure preventive of typhoid fever, but an apparatus such as is manufactured now becomes corrupted to a certain extent, and unless cylinders are provided for weighing the chlorine you can not rely on the automatic weighing. Through the North Tonawanda intake recently we had quite a number of cases of typhoid fever, and by positive demonstration we discovered that they were using less than half the amount of chlorine they were supposed to use because the treating apparatus did not work.
Mr. Tawney. The State Board of Health of New York has had this report of the consulting sanitary engineer now for some two months for study. Have you given any study to the problems that are discussed in that report?
Dr. Clark. That would be a matter beyond my jurisdiction. It would be taken up entirely by the engineer division of the department at Albany.
Mr. Tawney. Do you know whether or not they have studied those problems?
Dr. Clark. Located here, I have charge of five counties in western New York. I represent the department locally, but I am not connected very much with the Albany office.
Mr. Powell. Prof. Phelps, I would like to have you bring out clearly before the gentlemen present the object and policy in making your studies. It was not with the idea, I presume, of imposing on the city of Buffalo or the city of Detroit any particular system, but it was to show to both communities that the result you thought advisable could be worked out at a certain cost, and if they could work them out more cheaply than that it is not your purpose to interfere with them. Was that your idea?
Prof. Phelps. Yes, sir.
Mr. Powell. That is one object. The other was in the capacity of an adviser to point out some feasible method by which it can be done if they choose to adopt it, and I understand you to say that they might, by further study, reduce the cost or make changes in particular features of the scheme which might be more feasible than even the scheme which you have recommended?