Mr. Powell. Have you any data, exact or otherwise, as to the summer population of the district?
Mr. Dallyn. No; but I think there is something in Dr. McLaughlin’s report as to that. We made no calculations ourselves. I know the populations of Cape Vincent and Clayton double themselves in the summer; but what the island population and the excursion population were I have not any idea.
Mr. Mignault. Is there any record available to show what that summer population amounts to?
Mr. Dallyn. I am not sure.
Mr. Mignault. It is rather important to know because that is a feature, that and the pollution, and it strikes me at the present moment that even if the communities treat their sewage and the boats sterilize theirs, there will be still a danger from this summer population camping on the islands.
Mr. Dallyn. Yes; that is true. They will come, of course, under township regulations. I do not know just how they handle them on the American side. In the Muskoka Lakes we make them treat their sewage properly.
Mr. Mignault. How do they accomplish that?
Mr. Dallyn. They have various methods of getting at it. Some use the chemical process, and store it and pump it out in a nocuous form into beds. Some lay piles through the sand.
Mr. Mignault. What is your opinion as to the danger of pollution from your summer population?
Mr. Dallyn. It is very serious. We were very much amazed in making a minute survey on some of the islands to find that their sewage outlet and their intakes would be only 40 feet away from each other, making it practically certain that the two would mingle.