Mr. Rich. That is it. That is as far as we would feel justified in going.
Mr. Tawney. Have you any opinion to express as to whether there should be one hour or two hours of sedimentation?
Mr. Rich. No. I think that would depend considerably upon the character of the sewage. We have made no tests whatever of the time required for the Detroit sewage. In fact, we have made no tests of any sort on the Detroit sewage.
Mr. Tawney. Have any of your assistants anything to offer independent of what you have set forth?
Mr. Rich. The two men who made the actual studies down the stream from here are present, and if you would like to hear from them at this time or at a future time they will be available. Mr. Follin had charge of the field work in the investigation at Ford City, Wyandotte, and Trenton.
STATEMENT OF MR. JAMES W. FOLLIN, OF DETROIT,
ASSISTANT TO THE STATE SANITARY ENGINEER.
Mr. Follin. Mr. Chairman and gentlemen, the survey which Mr. Rich has explained to you and which Mr. Waterman and I made at Ford City, Wyandotte, and Trenton, was made primarily to determine the conditions existing in connection with the high typhoid death rate in those communities and to determine what should be done to remedy those conditions. I have here a digest of the work as we planned it and carried it on which I will go over with you. The necessity for these surveys was shown by the high typhoid death rates in these communities.
Mr. Tawnet. What were those death rates?
Mr. Follin. They are given in this statement which I will read:
A sanitary survey in the villages of Ford and Trenton and in the city of Wyandotte has recently been made by E. L. Waterman and J. W. Follin under the direction of the State sanitary engineer and by authorization of the State board of health. The necessity for such surveys was shown by a study of the typhoid fever death rates in these communities. This study disclosed the following facts: