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HydroElectric Power Commission of Ontario Review of the Subject.-This paper covers a general de-care of the extremely heavy short-circuit conditions; and features scription of the entire Queenston-Chippewa development of the of the design of the power house whereby in every 50-foot length HydroElectric Power Commission of Ontario, on the Canadian of building all equipment for one 45,000-kv-a. unit, covering penside of the Niagara River, which will have an ultimate capacity stock, turbine, generator, switching equipment, transformers and approximating 650,000 h. p. outgoing line, is accommodated; the provision of the main floor Throughout the period of preliminary study of thedevelopment and later as the design progressed, continuous use was made of models of the various structures es in order that the mathematical analysis might be | 4 , reinforced by actual demonstrations under the assumed E M M conditions. Such models were made for the studies of the intake, the bends in the canal, the transitions, the diffuser at the mouth of the forebay, and on the draft tubes and station substructure. A calculation

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