Mr. Tawney. What is your position, Mr. Knowles?
Mr. Knowles. I am a consulting sanitary engineer in general practice.
Mr. Tawney. Located where?
Mr. Knowles. In Pittsburgh, Pa. That is my home now. I have practiced over the United States.
Mr. Tawney. Are you connected officially with the Great Lakes Pure Water Association?
Mr. Knowles. Yes, sir; I am a member of that association.
Mr. Tawney. From your knowledge of the reference submitted to the commission by the two Governments and your knowledge of the scope of the investigation, what have you to say with reference to whether or not thus far the investigation has proceeded practically and as speedily as would ordinarily be expected under the circumstances? I am asking you the same question that Mr. Magrath asked this morning of the chief sanitary engineer of the State of Michigan, merely for the purpose of getting on the record an expression of your views.
Mr. Knowles. I think good progress and good judgment up to date have been shown, provided the criteria be taken as not too absolute; and the statement made by Prof. Phelps this morning is very helpful along that line.
Mr. Tawney. Have you any knowledge as to the time that was consumed in the investigation of a similar subject in the Mississippi River on account of the alleged pollution of that river by the Chicago Drainage Canal?
Mr. Knowles. No; I do not know the exact time. It was some considerable time. I think it must be remembered that in any of these matters it not only takes time for an investigation, but it takes a good deal of time for necessary assimilation and education.