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Memorandum regarding the manner in which an ice cover forms in rivers and it's effect upon the flow of water in the channel which it covers.
Author:Duncan William MacLachlan
Date:~1923
Note: This document is an early draft as can be seen from the markup. Unfortunately, there is no date on the document. This is likely preliminary work for his paper submmitted to the "Engineering Institute of Canada" on "The St. Lawrence River Problem" on January 24th, 1924.
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