. American hydroelectric practice; a compilation of useful data and information on the design, construction and operation of hydroelectric systems, from the penstocks to distribution lines . 108 HYDROELECTRIC PRACTICE. TS 109 Y curves,,kes, 8 , with-ent such,hs of thein. thick, yet con--nd 80 height. my ed on tenI in with a3h can bethe roof ofnk is highiter in the>ed by the .h a 12 enoughto set up

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