The unit measure of time. Address at the opening of Section III of the Royal society of Canada, by the president, Dr. Sandford Fleming, May 27th, 1890 The unit measure of time. Address at the opening of Section III of the Royal society of Canada, by the president, Dr. Sandford Fleming, May 27th, 1890

The unit measure of time. Address at the opening of Section III of the Royal society of Canada, by the president, Dr. Sandford Fleming, May 27th, 1890

Sandford Fleming

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OL Work ID: OL24992741W

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