Publisher's Synopsis
Excerpt from Regulation of Elevation and Discharge of the Great Lakes: Designs for Gates, Sluices, Locks, Etc., In the Niagara and St. Clair Rivers
The preservation of Niagara Falls. Studies of the variation of rainfall from year to year.
Studies of the amount of obstruction of out?ow from the several lakes caused by ice-gorges.
A determination of the amount and rate of evaporation from the surface of each Great Lake.
The accuracy of the recorded measurements of lake elevations and discharges.
The rate, and amount in recent years, of earth-tilt in the Great Lakes region.
The effect of earth-tilt on future harbor depths and depths over the lock-sills at the Sault St. Marie.
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