Excerpt from Lecture Delivered by H. O'sullivan, F. R. G. S: Before the Quebec Board of Trade, on the 13th June, 1911
But there would be no necessity for filtering, if, instead of laying a new pipe from Lorette to Grande Allee, 40 inch diameter, whit is altogether too large for the capacity of the river, for one half of the year, we would extend, say, 40 inch main from the present Aqueduct to upper lake St. Charles, it would be ample to fill with pure water, both your 18 inch and 30 inch mains now laid.
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