ctions were placed at the falls, and that, in low- water condi- ing operations, it was essential to meas- tions of the canal, the obstruction at the ure over a considerable length. Of course, a leveling instrument was not fall was higher than the bed of the canal accurate enough to measiu'e the… … discharge under those conditions bore no methods in measuring the slope in a very relation to the depth of water in the short distance. It would be possible to canal, and he had thrown light in various have a baulk of timber, say 40 feet in ways on the action of water in a reach of length, of…
Engineering
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