River and Canal Engineering, the characteristics of open flowing streams, and the principles and methods to be followed in dealing with them. — 3. Locks.—An ordinary lock is shown in fig. 29A. The space above the head gates is called the “head bay,” and that below

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River and Canal Engineering, the characteristics of open flowing streams, and the principles and methods to be followed in dealing with them. 3. Locks.—An ordinary lock is shown in fig. 29A. The space above the head gates is called the “head bay,” and that below · ch 44/78

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