“In this water, instead of passing over, or entirely under the wheel, is delievered in the direction of its centre. This is one of the most common wheels, and is employed where there is not a sufficient fall for the construction of the overshot kind.” -Comstock 1850
J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 135
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