Waterwheel, efficiency 80%, Loss 20%, generates 8.0 horsepower. Connections, “ 95%, “ 5%, transfers 7.6 “ Dynamo, “ 90%, “ 10%, generates 6.8 “ Transmission, “ 90%, “ 10%, transmits 6.2 “ Motor, “ 90%, “ 10%, develops 5.5 “ Connections, “ 95%, “ 5%, delivers 5.0 “ Therefore, only five horsepower would be actually delivered to the machine to be driven. This amounts to only half of the theoretical power of the falling water which is actually realized in useful work of the machine being driven. If the power from the waterwheel is to be applied directly without generating electricity a much higher efficiency will be realized. ACKNOWLEDGMENT On behalf of the State Water Supply Commission and the writer, grateful acknowledgment is made to the following named persons who have extended courtesies to me by furnishing information or illustrations for use in connection with the preparation of this pamphlet: Mr. E. Burdette Miner, Oriskany Falls, N. Y. Mr. R. K. Miner, Little Falls, N. Y. Mr. Jared Van Wagenen, Jr., Lawyersville, N. Y. Mr. John T. McDonald, Delhi, N. Y. Mr. Edward R. Taylor, Penn Yan, N. Y. Mr. John Liston, General Electric Company, Schenectady, N. Y. Mr. R. E. Strickland, General Electric Company, Schenectady, N. Y. Mr. Stephen Loines, Brooklyn, N. Y. Mr. George E. Dunham, Utica, N. Y. Pelton Water Wheel Company, New York and San Francisco. James Leffel & Company, Springfield, Ohio. D. R. COOPER. ALBANY, JANUARY 25, 1911. PUBLICATIONS OF STATE WATER SUPPLY COMMISSION STATE OF NEW YORK REPORTS =First Annual Report= Published February 1, 1906. Includes Commission’s annual report on applications for approval of plans for public water supplies; also summarized statistics of public water supplies and sewage disposal in New York State. Edition exhausted. =Second Annual Report= Published February 1, 1907. Includes Commission’s annual report and decisions on applications for approval of plans for public water supplies; also summarized statistics of public water supplies and sewage disposal in New York State, supplementary to statistics published in First Annual Report; also report on River Improvements for the benefit of public health and safety. Edition exhausted.