Locks
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“The lock C is a controllable compartment with raise-able and lower-able gates D and E. Since water always finds its level, by raising and lowering the gates, two separate water levels can be maintained and still provide water transportation through the lock.” —Quackenbos 1859
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Fluid MechanicsSource
G. P. Quackenbos A.M. A Natural Philosophy: Embracing the Most Recent Discoveries in the Various Branches of Physics, and Exhibiting the Application of Scientific Principles in Every-day Life (New York: D. Appleton and Company, 1859) 134
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