From the Historic American Engineering Record (dated 1973):
Gladden Wind Turbine.
Date : 1890-1891
Location: Pidgeon Valley Rd, Napoli, Cattaraugus County, New York
Built by: George Gladden
Owned by : Originally : George Gladden
Presently : John Milks
Significance : The Gladden wind turbine is a well preserved example of a vertical wind turbine
built during the 19th century. Although no longer operational, the turbine (and associated mill
structure) is a rare example of wind power technology in the United States.